QP2-4R7 4.7 Ohm 3-Pin Starter and Overload Kit
4.7Editor score
Three-pin PTC starter relay
Includes matching overload protector
Broad compact-appliance compatibility
In this guide
A refrigerator relay switch is a small but essential component in the compressor starting system of many refrigerators, freezers, beverage coolers, and wine coolers. A good replacement must match the original part’s configuration, resistance, pin arrangement, electrical rating, and intended application. Choosing by brand name alone is not enough, because visually similar components can have materially different specifications.
This guide compares ten relay switch options using the details supplied with each product, including replacement part numbers, relay resistance, pin count, included overload protectors, compressor compatibility, maximum current, and stated applications. It covers both dedicated start relay-and-capacitor assemblies and universal-style PTC starter kits, with special attention to matching the component to the appliance before ordering.
The reviews show which products are most appropriate for common refrigerator repair situations, including dedicated Whirlpool-family components, one-pin mini-fridge starters, two-pin compact-appliance kits, and three-pin systems. The top selections reflect compatibility, construction, included hardware, and usefulness rather than a claim that every refrigerator can use the same replacement. Availability and product configurations can change, so confirm the original part before purchasing.
Top 3 Picks for Best Relay Switch for Refrigerator
BlueStars W10613606 Compressor Start Relay and Capacitor
4.2Editor score
Combined relay and capacitor
Extensive replacement part list
Compatible with major appliance brands
QP2-4.7 Two-Pin Starter and Overload Kit
4.7Editor score
Two-pin relay configuration
Maximum current of eight amps
Suitable for multiple cooler types
Top 10 Best Relay Switch for Refrigerator in 2026 Compared
The comparison below organizes all ten options by component type, relay configuration, electrical compatibility, and intended appliance use. These distinctions are more important than brand names because a relay that differs in resistance, pin count, current rating, or terminal layout may not connect safely to the compressor system.
ProductsSpecificationsEditor scorePrice
Editor's Choice
BlueStars W10613606 Relay and Capacitor
Combined relay and capacitor
Dedicated replacement assembly
Major refrigerator brand coverage
Multiple OEM part replacements
4.2Editor score
Editor's Choice
QP2-4R7 Three-Pin Starter Kit
4.7-ohm three-pin relay
Includes overload protector
1/12 to 1/2 horsepower
110V 60Hz operation
4.7Editor score
Best Premium
W10197428 Starter and Capacitor Kit
Dedicated TSD2 starter relay
Includes run capacitor
Up to one-quarter horsepower
Specified terminal interfaces
4.1Editor score
QP2-4.7 Two-Pin Starter Kit
4.7-ohm two-pin relay
Includes overload protector
Eight-amp maximum current
Coolers and compact freezers
4.7Editor score
Mudder One-Pin Starter Kit
4.7-ohm one-pin relay
Includes overload protector
Fifteen-amp protector limit
Mini fridges and coolers
4.3Editor score
QP-02-4.7 Three-Pin Kit
4.7-ohm three-pin relay
Includes one-half horsepower protector
Twelve-amp relay limit
110V compressor application
4.3Editor score
QP2-4.7 One-Pin Starter Kit
4.7-ohm one-pin relay
Includes half-horsepower protector
Twelve-amp relay limit
Mini fridges and freezers
4.3Editor score
BlueStars Two-Pack W10613606 Kit
Two combined relay capacitors
Dedicated replacement assembly
Extensive OEM part list
Major refrigerator brand coverage
4.2Editor score
Five-Set One-Pin Starter Kit
Five one-pin starter relays
Five overload protectors
1/6 horsepower protector
Broad compact-appliance use
4.4Editor score
Two-Set One-Pin Starter Kit
Two one-pin starter relays
Two overload protectors
4.7-ohm PTC relay
Mini fridges and coolers
4.4Editor score
1. BlueStars W10613606 Relay and Capacitor – Best Dedicated Replacement
BlueStars W10613606 Relay and Capacitor
Combined relay and capacitor
Model W10613606
Major brand compatibility
Lifetime defect protection
The BlueStars W10613606 Refrigerator Compressor Start Relay and Capacitor is a dedicated replacement assembly for compatible refrigerators, with a supplied customer rating of 4.2. Its strongest feature is the combination of a compressor start relay and run capacitor in one product, reducing the need to locate and coordinate two separate parts. It is intended for users repairing a refrigerator that uses the W10613606 configuration or one of the listed equivalent part numbers.
Pros
- Combines two required components
- Lists numerous replacement part numbers
- Covers major refrigerator manufacturers
- Targets common cooling failures
- Includes lifetime protection
Cons
- Only fits specified configurations
- Compatibility requires model verification
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Compatibility information is unusually helpful for a replacement component. The stated coverage includes Amana, Kenmore, Maytag, Whirlpool, KitchenAid, Jenn-Air, Litton, Crosley, Dacor, Admiral, Hardwick, Magic Chef, and Inglis models. The replacement list includes 14217273, 67003186, 67003764, 67005560, 67005561, 67005562, 8171210, 8208290, 8208368, C8931605, W10416065, W10613606VP, and PS8746522, giving repairers several ways to cross-check the original component.
The product is also marketed for symptoms such as a refrigerator that will not start, a warm refrigerator compartment, a warm freezer section, or both sections remaining too warm. Those symptoms can also arise from unrelated faults, so the relay is not a universal diagnosis. A replacement that does not address the actual cause may appear to fail even when the new component is electrically sound. The supplied lifetime protection is another useful feature, although it does not remove the need to confirm fit.
This is the strongest choice for someone who has already identified W10613606 or a listed equivalent as the required part. It is particularly attractive when the old relay and capacitor are aged or suspect, because the combined package simplifies the repair. Avoid choosing it solely because a refrigerator carries a familiar brand name; compare the model number, old part number, physical layout, and wiring before ordering. With those checks completed, it provides a focused solution for a clearly defined refrigerator platform.
One Assembly Simplifies the Repair
The relay and capacitor are combined in one replacement, which can reduce component-matching errors and streamline a repair involving both parts. It is especially useful for compatible major-brand refrigerators where the original assembly used the W10613606 design.
Extensive Part Cross-References
The long list of equivalent part numbers provides useful confirmation when an old component is worn, faded, or difficult to identify. Matching any one listed number against the appliance documentation is a stronger decision than relying on appearance alone.
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2. QP2-4R7 Three-Pin Starter Kit – Best Three-Pin Compact Appliance Kit
QP2-4R7 Three-Pin Starter Kit
4.7-ohm three-pin relay
Matching overload included
Up to one-half horsepower
110V 60Hz operation
The QP2-4R7 4.7 Ohm 3-Pin PTC Starter/Start Relay and Overload Kit carries a supplied rating of 4.7, making it one of the strongest-rated options in this roundup. It includes a 4.7-ohm, three-pin PTC starter relay and a refrigerator overload protector, creating a practical repair package for compatible refrigerators and compact cooling appliances. The three-terminal configuration is its defining feature and must match the component being replaced.
Pros
- Highest-rated kit in the group
- Starter and protector packaged together
- Supports broad compressor range
- Replaces numerous common part numbers
Cons
- Three-pin fit must be confirmed
- Not suitable for every compressor
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The kit replaces QP2-4R7, QP2-4.7, QP2-4.7G12, WS-EP14F, 6R8MD3, AP4565041, 1206682, and 3990100070. The included overload protector is specified for 1/12-horsepower through 1/2-horsepower, 110V, 60Hz compressors and lists a series of LG-related and other common replacement numbers. This broad specification is useful for mini fridges, beverage coolers, and refrigerators that use a genuine three-pin 4.7-ohm starter.
Its limitations are important because the relay and overload protector are not universally interchangeable. A compressor with one or two terminals requires a different configuration, and a relay operated beyond its intended current range can fail. Likewise, a compressor outside the stated horsepower range may need a different protector. The listed brand compatibility—covering names such as Vissani, Danby, EdgeStar, Summit, Whirlpool, Frigidaire, Kenmore, Haier, Igloo, and Magic Chef—helps narrow the field but should not replace checking the old relay and compressor specification.
This kit is an appealing choice for a compatible three-pin system because it combines both commonly serviced electrical components in a single package. It is best for a repairer who can positively identify QP2-4R7 or a listed equivalent and confirm the compressor falls within the stated voltage, horsepower, and current expectations. For a one-pin mini refrigerator, choose one of the dedicated one-pin kits instead; for a major refrigerator with a dedicated relay-and-capacitor assembly, use the more specific replacement.
Starter and Protector in One Kit
Including both the PTC starter relay and overload protector means the buyer does not need to assemble a repair from unrelated generic parts. It is a convenient option for compatible three-pin systems where both components show age or wear.
Useful Broad Compressor Range
The stated 1/12-horsepower to 1/2-horsepower range covers many compact and mid-size cooling appliances. Confirming the compressor rating is essential because correct terminal configuration and electrical capacity must both be satisfied.
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3. W10197428 Starter and Capacitor Kit – Best for Specified Major Refrigerators
W10197428 Starter and Capacitor Kit
TSD2 compressor starter
Run capacitor included
Up to one-quarter horsepower
Distinct terminal interfaces
The W10197428 W10189190 TSD2 Refrigerator Start Relay and W10662129 Run Capacitor is a combined repair package for refrigerators that use the specified starter and capacitor design. Its supplied rating is 4.1, and its defining advantage is detailed compatibility information rather than broad universal positioning. The package includes a W10189190 TSD2 starter with a 6.3-millimeter interface and a W10662129 run capacitor with a 4.8-millimeter interface.
Pros
- Starter and capacitor included
- Extensive starter replacement list
- Extensive capacitor replacement list
- Covers many major-brand refrigerators
Cons
- Specific horsepower limit
- Interface dimensions must match
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The starter is described for compressors of one-quarter horsepower or less and replaces a long collection of numbers, including W2319792, W10448878, 297237702, WR07X10097, WR08X21100, W10448874, 2312074, 241941004, 241941005, 2319792, 4357156, 2255554, 10097201, 14200214, and numerous other listed references. The capacitor covers another broad set of replacements, including 2188516, 2264017, 4356442, 4356995, 4390503, 65889-2, 68001280, 945508, C8931601, C8931602, and AP5807758.
The product is marketed against failure to start, clicking, no cooling, and excessive heat in the refrigerator or freezer. Those complaints are common enough to create temptation to replace parts without diagnosis, yet the stated warning that mismatched models may overheat or fit incorrectly is significant. Both compressor power and interface size need verification. The compatible-brand list includes Kenmore, Whirlpool, Amana, Maytag, Norse, Roper, KitchenAid, Jenn-Air, Magic Chef, and Estate, but the model and electrical specification remain the deciding factors.
This kit is best for a technician or experienced repairer who can match both part numbers and physical interfaces. Its dedicated configuration makes it more suitable than a generic PTC relay for compatible full-size refrigerators. It is not the most convenient choice for an unknown appliance, because a buyer must validate the starter interface, capacitor interface, and compressor horsepower. When all three details align, however, the combination provides a focused two-component repair solution.
Specific Interfaces Reduce Guesswork
Published 6.3-millimeter and 4.8-millimeter interface dimensions help confirm that the parts will physically fit. This is more dependable than matching a generic relay by shape or brand family alone.
Comprehensive Replacement Cross-References
Both the starter and capacitor have extensive lists of equivalent part numbers. Those references are valuable when the original label is difficult to read or when several similarly named components appear in parts catalogs.
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4. QP2-4.7 Two-Pin Starter Kit – Best Two-Pin Mini Fridge Solution
QP2-4.7 Two-Pin Starter Kit
4.7-ohm two-pin relay
Includes overload protector
Eight-amp maximum current
Broad compact-cooler use
The QP2-4.7 PTC 4.7 Ohms Starter Relay, 2 Pin Refrigerator Starter Relay and Refrigerator Overload Protector Replacements Part is built around the two-pin configuration commonly found in compact refrigerators and coolers. It has a supplied rating of 4.7 and includes both a 4.7-ohm PTC relay and an overload protector. That pairing makes it a focused choice rather than a universal relay disguised as a simple spare part.
Pros
- Clear two-pin configuration
- High supplied customer rating
- Starter and protector included
- Wide range of cooler applications
Cons
- Eight-amp limit is restrictive
- Only matches two-pin designs
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The kit replaces AP4439459, 1357963, AH3529540, EA3529540, and PS3529540. Its stated applications include mini fridges, compact refrigerators, beverage coolers, wine coolers, deep freezers, and chest freezers. This makes it a versatile option for repairers servicing a varied collection of smaller appliances. The direct-replacement design and straightforward installation description also suit users who want to restore cooling after diagnosing a failed starter or protector.
The key safety specification is an eight-amp maximum current for the 4.7-ohm PTC relay. That rating is lower than the limits stated for several competing kits, so this product is best for appropriately sized appliances. Operating beyond the limit may cause the relay to fail. The two-pin layout must also be verified: a one-pin or three-pin component may look similar but will not provide the same terminal arrangement or operation. The product is not the right choice for a refrigerator whose old relay has a different resistance or configuration.
This is a strong selection for a compatible two-pin mini refrigerator or cooler, particularly when both the starter and overload protector need replacement. The included parts simplify sourcing, while the explicit current limit provides valuable guidance. Buyers should compare the old relay’s pins, resistance marking, wiring, and compressor requirements before ordering. Once those details are confirmed, this is a well-targeted repair kit for the appliances it is designed to serve.
A Focused Two-Pin Replacement
The two-pin relay is clearly identified, which helps prevent buyers from confusing it with the numerous one-pin and three-pin QP2-style starters on the market. Visual and printed-configuration checks should both be used.
Clear Current Safety Limit
The stated eight-amp ceiling gives repairers a concrete limit to compare with the appliance. It is a meaningful safety specification that should be checked before installation rather than treated as a minor technical detail.
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5. Mudder One-Pin Starter Kit – Best for One-Pin Mini Fridges
Mudder One-Pin Starter Kit
4.7-ohm one-pin relay
6750C-0005P overload protector
Fifteen-amp protector maximum
Direct replacement installation
The Mudder 2 Pcs QP2-4.7 PTC Starter Relay and 6750C-0005P Overload Protector is intended specifically for refrigerators using a QP2-4.7 one-terminal starter. It has a supplied rating of 4.3 and includes one PTC relay plus one overload protector. This precise focus makes it relevant to mini fridges and compact coolers that use the one-terminal format rather than the two- and three-pin alternatives in this roundup.
Pros
- Designed for one-pin QP2 relays
- Includes compatible overload protector
- Useful for many compact appliances
- Durable plastic and brass construction
Cons
- Only compatible with one terminal
- Higher-current appliances need different protection
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The product is described as compatible with mini fridges, compact refrigerators, beverage and beer coolers, deep freezers, and wine refrigerators. It is associated with symptoms such as a compressor that will not start, excessive heat, and a clicking or clacking sound every three to five minutes after power is applied. The relay is made from plastic, while the protector uses plastic and brass, giving the kit a straightforward construction for repeated service use.
The overload protector can replace AP4439459, 1357963, AH3529540, EA3529540, and PS3529540, and its maximum current is listed as 15 amps. The product explicitly warns that a high-current refrigerator requires a protector with suitable parameters; using the wrong one can burn. Likewise, the starter is only compatible with a QP2-4.7 one-terminal relay. Those restrictions are reasonable for a model-specific kit, but they mean that the original component and compressor must be identified before ordering.
This kit is a good fit for a compact appliance with a clearly identified one-terminal 4.7-ohm starter and a compatible 6750C-0005P-style protector. It gives the buyer both frequently replaced components in one order. It is not appropriate for a two-pin or three-pin refrigerator, nor for a high-current compressor that requires different overload protection. For those situations, choose the corresponding kit with the correct terminal count and electrical rating.
Purpose-Built for One-Terminal Starters
The kit is explicitly limited to the QP2-4.7 one-terminal format, reducing ambiguity in a category crowded with visually similar products. Confirm the pin count and resistance marking on the failed relay.
Protector Parameters Require Attention
The included overload protector has a stated 15-amp maximum, but the manufacturer emphasizes that higher-current refrigerators need appropriately rated protection. Checking the compressor specification is essential.
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6. QP-02-4.7 Three-Pin Kit – Best Detailed Wiring Reference
QP-02-4.7 Three-Pin Kit
4.7-ohm three-pin relay
One-half horsepower protector
Twelve-amp maximum current
110V compressors only
The 1Pcs QP-02-4.7 3Pin 4.7 Ohm Refrigerator Start Relay Coolers Compressor Starter with 1Pcs 1/2HP Refrigerator Overload Protector is a three-pin repair kit for compatible 110V compressor systems. Its supplied rating is 4.3, and it includes a 4.7-ohm starter relay along with a one-half-horsepower overload protector. The clear specifications make it easier to assess than an unidentified generic relay.
Pros
- Includes relay and overload protector
- Provides explicit wiring guidance
- Defines maximum current clearly
- Targets three-pin systems
Cons
- Limited to 110V compressors
- Three-terminal configuration is restrictive
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The product distinguishes itself through detailed installation information. It instructs users to disconnect the power and wear work gloves, then describes connecting the protector terminal to the live wire, the second PTC relay terminal to neutral, and, where a capacitor is present, the first and third relay terminals to the capacitor. It also states that incorrect wiring can cause short circuits or equipment damage and recommends professional maintenance technicians for installation.
The electrical limits are explicit: the kit is for QP-02-4.7 three-terminal relays, only 110V compressors, and a maximum relay current of 12 amps. It is intended to address compressor starting failures, overheating, and repeated clicking every three to five minutes after startup. The product also acknowledges that the relay is only one part of the diagnosis, since compressor failure, controller failure, wiring problems, and other issues can create similar symptoms.
This kit is well suited to a technician who values precise wiring guidance and has confirmed the compressor voltage, relay resistance, terminal count, and current draw. It is not appropriate for a refrigerator with a one- or two-pin starter, nor for an appliance outside the stated 110V scope. The package combines the two principal electrical components and provides enough technical guidance to support careful installation, making it a practical choice for a properly identified system.
Wiring Guidance Supports Safer Repairs
The described terminal connections give a repairer a concrete reference for installation. Because the instructions also emphasize power disconnection and correct wire identification, they help reduce avoidable wiring errors.
Scope of Failure Symptoms
The kit addresses starting, overheating, and repeated click symptoms, but the listing correctly notes that similar behavior may result from compressor, controller, wiring, or other faults. Diagnosis should precede ordering.
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7. QP2-4.7 One-Pin Starter Kit – Best Broad Mini Fridge Replacement
QP2-4.7 One-Pin Starter Kit
4.7-ohm one-pin relay
Half-horsepower overload protector
Twelve-amp maximum current
Multiple cooler applications
The 1 Pack QP2-4.7 QP2-4R7 4.7 Ohm Refrigerator 1 Pin PTC Start/Starter Relay Refrigerator Overload Protector is a one-pin starter kit designed for compact refrigerators and coolers. It has a supplied rating of 4.3 and includes a 4.7-ohm PTC relay with a one-half-horsepower overload protector. It targets the widely encountered QP2-4.7 one-terminal arrangement, making it a practical choice for a common class of mini-appliance repair.
Pros
- Common one-pin QP2 format
- Includes matching overload protector
- Works across many compact appliances
- Straightforward direct replacement
Cons
- Twelve-amp limit must be respected
- Not for other terminal configurations
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The kit replaces AP4439459, 1357963, AH3529540, EA3529540, and PS3529540. Its listed applications include mini fridges, compact refrigerators, beverage coolers, wine and beer coolers, deep freezers, and chest freezers. That broad coverage is useful for repairers who service multiple appliance categories, while the direct-replacement design simplifies installation when the original terminals and wiring match.
A maximum current of 12 amps is stated for the PTC relay, and exceeding that limit makes the relay unsuitable. This limitation matters because a visually similar relay may have a different safe operating range. The one-pin format is equally decisive: a two-pin or three-pin starter cannot be treated as interchangeable. The overload protector is also matched to a one-half-horsepower application, so compressor specifications should be confirmed before installation.
This product is best for a compact refrigerator that uses a one-pin 4.7-ohm relay and a compressor within the listed electrical range. It offers a well-understood package containing the starter and overload protector, reducing the need to search for a separate replacement. It is less suitable when the exact old part is unknown. In that case, remove the failed relay and verify the pin count, resistance marking, amperage, and compressor horsepower before choosing this kit.
Common Format for Compact Appliances
The one-pin QP2-4.7 format appears across many types of small cooling appliances. Its prevalence can make this a convenient stock part for repairers working on mini fridges and coolers.
Complete Two-Piece Replacement
Supplying both the PTC relay and overload protector provides a convenient repair package. The two components should still be matched to the appliance rather than treated as universal parts.
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8. BlueStars Two-Pack W10613606 Kit – Best Spare-Pair Option
BlueStars Two-Pack W10613606 Kit
Two relay capacitor assemblies
Model W10613606
Extensive replacement numbers
Major-brand model coverage
The BlueStars 2 Packs W10613606 Refrigerator Compressor Start Relay and Capacitor is a two-unit version of the dedicated W10613606 replacement assembly. Its supplied rating is 4.2. Each package includes a refrigerator compressor start relay and capacitor, making the set appealing to owners or service professionals who want a spare after completing a repair or who know that two appliances use the same configuration.
Pros
- Two complete assemblies included
- Useful for maintaining a spare
- Extensive cross-reference list
- Targets major refrigerator models
Cons
- More parts than one repair may need
- Only suitable for specified models
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The brand and model coverage includes Whirlpool, KitchenAid, Kenmore, Amana, Maytag, Jenn-Air, Litton, Crosley, Dacor, Admiral, Hardwick, Magic Chef, and Inglis. Specific compatible model examples include Kenmore 59676579601, 59676582501, 59676582701, 59676583600, 59676589600, 59677539600, and several listed Whirlpool GB2SHD series models. Equivalent replacement numbers include 14217273, 67003186, 67003764, 67005560, 67005561, 67005562, 8171210, 8208290, 8208368, C8931605, W10416065, W10613606VP, and PS8746522.
The product is marketed to correct failure to start and excessive warmth in the refrigerator, freezer, or both sections. As with any relay replacement, those symptoms should be confirmed as relay-related before parts are changed. The two-pack format is the principal trade-off: a single failed component does not necessarily require two assemblies, and the extra unit is most valuable when a matching spare is desired. The components are still limited to the specified physical and electrical configuration.
This is a particularly practical choice for someone who has confirmed W10613606 compatibility and wants either a two-repair supply or one replacement plus a backup. It combines the same dedicated relay-and-capacitor design as the single BlueStars option, so its model-specific verification is equally important. For owners of compatible major-brand refrigerators, keeping a spare can reduce future downtime, but the old relay or model documentation should still be used to verify the match.
Useful for Two Compatible Appliances
A two-pack can serve households or service operations with more than one refrigerator using the W10613606 design. It also allows one sealed assembly to remain available as a backup after installation.
Dedicated Major-Brand Coverage
The detailed brand and model references make this suitable for full-size refrigerators rather than generic mini-appliance starters. Model-number confirmation remains essential even when the appliance brand is listed.
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9. Five-Set One-Pin Starter Kit – Best for Multi-Appliance Maintenance
Five-Set One-Pin Starter Kit
Five one-pin starter relays
Five overload protectors
1/6 horsepower protector
Broad compact-appliance use
The Refrigerator Compressor Relay and Overload Kit 5 Sets is the largest maintenance package in this roundup. It contains five 4.7-ohm, one-pin PTC starter relays and five 6750C-0005P-style refrigerator overload protectors. With a supplied rating of 4.4, it is particularly relevant to repair professionals, landlords, or households responsible for several compatible mini refrigerators, beverage coolers, or compact freezers.
Pros
- Largest multi-appliance package
- Five matched component pairs
- Broad brand and appliance coverage
- Direct replacement design
Cons
- Excess stock for a single repair
- Only suited to one-pin designs
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The stated applications include mini refrigerators, compact refrigerators, beverage and beer coolers, deep freezers, wine refrigerators, and wine centers. Compatible brand names include Vissani, Danby, Vinotemp, EdgeStar, Summit, Whirlpool, Frigidaire, Kenmore, Maytag, Haier, Igloo, and Magic Chef. The starters are made from plastic, while the overload protectors are described as stainless steel, and the direct-replacement design is intended to make installation straightforward.
A notable detail is the one-sixth horsepower specification for the included overload protectors. The package contains five pairs, so it can support several small appliances, but the relay and protector must still match each unit’s compressor and configuration. A one-pin replacement is not appropriate for two-pin or three-pin systems. Buyers should also verify whether the failed relay is truly 4.7 ohms and whether the overload protector’s part designation and rating align with the original component.
This kit is the strongest choice for planned maintenance across multiple compatible appliances. Instead of ordering a single relay and protector repeatedly, a technician can keep several complete pairs available, which may be especially useful for rental units or a service inventory. For one occasional repair, a smaller kit would be more proportionate. The five-set format is efficient only when several appliances genuinely use the same one-pin, 4.7-ohm configuration and one-sixth-horsepower protector specification.
Efficient for Repeated Repairs
Five complete sets reduce repeated sourcing when maintaining several mini refrigerators or coolers. The format is particularly useful for property managers and appliance service professionals with a recurring need.
Material and Application Clarity
The stated plastic relay, stainless-steel protector, and broad compact-appliance applications give buyers useful information. The one-sixth-horsepower protector specification must still be checked against each compressor.
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10. Two-Set One-Pin Starter Kit – Best Balanced Two-Repair Supply
Two-Set One-Pin Starter Kit
Two one-pin starter relays
Two overload protectors
4.7-ohm PTC relay
Plastic and brass construction
The 2 Pack QP2-4.7/4R7 1 Pin Refrigerator Starter Relay and Overload Protector provides two starter relays and two overload protectors. Its supplied rating of 4.4 makes it one of the better-rated options in the list. Each relay is a 4.7-ohm, one-terminal PTC component, creating a balanced package for repairing one appliance while retaining a second set for future use.
Pros
- Two complete replacement sets
- Common one-pin relay format
- Protects against compressor overheating
- Broad compact-appliance compatibility
Cons
- Only matches one-terminal relays
- Not intended for every compressor
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The kit is designed for brands using the one-pin QP2 4.7-ohm format and can replace AP4439459, 1357963, AH3529540, EA3529540, and PS3529540. It is listed for mini fridges, compact refrigerators, beverage and beer coolers, chest freezers, deep freezers, and wine or beer refrigerators. The relay is made from plastic, and the overload protector is made from brass, with both described as durable and rust resistant.
Its most important restriction is equally explicit: the product is only compatible with a QP2-4.7 one-terminal relay. It should not be selected for a two-pin or three-pin starter, even if the appliance brand and general appearance look similar. The overload protector is intended to prevent compressor overheating, but the compressor’s current requirements and the failed component’s specifications should still be verified. Repairs involving a failed compressor, controller, wiring fault, or refrigerant problem may require more than this replacement kit.
This is a good middle-ground option for someone with two compatible compact appliances or who wants one working set and one spare. It offers more utility than a single set without the inventory commitment of the five-set package. It is best for mini refrigerators and coolers that use the correct one-terminal relay, and less appropriate for unknown full-size refrigerator systems. Confirming the old relay’s terminal count and resistance remains the decisive first step.
Two Complete Sets Add Flexibility
The two-set package can service two appliances or provide one active repair and one backup. It suits owners of multiple compatible compact coolers without carrying the quantity of a five-set maintenance kit.
Protective Overload Component
The included overload protector is intended to prevent compressor overheating after the starter begins cycling. It remains important to confirm that the replacement protector rating suits the particular compressor.
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Buying Guide – How to Choose the Best Relay Switch for Refrigerator
The correct refrigerator relay switch is defined by the failed component, the compressor’s electrical requirements, and the appliance’s wiring arrangement. Use the model and part information to narrow the field before comparing convenience or package quantity.
Confirm the Original Part Number
Start with the model number of the refrigerator and the number printed on the old relay, starter, or combined relay-and-capacitor assembly. The old component may be faded, cracked, or mounted where its label is difficult to read, so appliance service documentation can be just as valuable as visual inspection. A compatible manufacturer part number is the most reliable way to distinguish a dedicated assembly from a generic PTC starter.
Match the original number against the complete replacement list, not merely the first similar-looking number. Also check whether the assembly is a relay only, a relay with an overload protector, or a relay and run capacitor. These different designs perform different functions and are not automatically interchangeable.
Match Pin and Terminal Count
Terminal count is one of the clearest ways to distinguish the QP2-style products in this guide. The options include one-pin, two-pin, and three-pin relays, and each is intended for a different wiring arrangement. Count the terminals on the old component, inspect the connector orientation, and compare it with the product photographs before purchasing.
A close visual match is still not enough. Verify the resistance marking, wire placement, and part designation as well. Terminal count is especially important for small refrigerators because the compact, visually similar starters can differ in meaningful electrical details.
Check Electrical Resistance and Voltage
Many of the general-purpose kits use a 4.7-ohm PTC relay, while dedicated assemblies are identified by their model number and expected original specifications. Confirm that the replacement has the same resistance, voltage rating, and terminal behavior as the component removed from the appliance.
The compressor’s voltage and horsepower should also be considered. Several kits are limited to 110V, and the included overload protectors cover specific horsepower ranges. A relay can have the right pin count yet still be inappropriate if it cannot safely support the compressor’s startup current.
Review Maximum Current Ratings
Maximum current is a safety limit, not merely a performance statistic. The products in this guide state relay limits ranging from eight amps to twelve amps, while some overload protectors have separate maximum-current figures. Compare those figures with the appliance’s compressor requirements and the rating of the component being replaced.
Exceeding a relay’s stated limit may cause it to burn. If the compressor draws more current than the kit supports, choose a more appropriate overload protector and relay combination rather than forcing the installation. A qualified technician can confirm compressor data when the original documentation is unavailable.
Determine the Required Components
Some refrigerators need only a starter relay, while others use a relay, overload protector, and run capacitor as separate components. The W10613606 and W10197428 options are combined assemblies for specific major-brand systems. The QP2-style kits generally include a starter and an overload protector, but the exact package varies among the one-, two-, and three-pin selections.
Inspect the old assembly and wiring diagram to determine what is missing or damaged. Replacing only a visibly burned component can leave a related protective or starting component in poor condition. Conversely, buying an unnecessary multi-component kit can complicate installation if its terminals do not match the appliance.
Assess Appliance Type and Use
The compact-appliance kits are mainly intended for mini fridges, beverage coolers, wine coolers, deep freezers, and chest freezers. Dedicated assemblies are more appropriate for compatible full-size refrigerators from major appliance manufacturers. Brand names can overlap between these categories, so the appliance type should support—not replace—part-number verification.
Think about the environment and usage pattern as well. A beverage cooler in a warm room, a frequently opened mini fridge, and a garage freezer can all create different operating demands. A proper relay must still match the compressor system, but knowing the use pattern helps identify the correct installation location and expected duty.
Consider Package Quantity
Single-component assemblies are economical for one confirmed repair. Two-set kits can serve two appliances or leave a useful backup, while five-set packages are best for maintenance inventories, rental properties, or service professionals. The additional quantity does not increase compatibility, so every unit in the package must fit the appliances for which it is intended.
For occasional repair, choose the smallest complete package that meets the need. For a fleet of compact appliances, a larger matching set may reduce repeated ordering. Store spare starters and protectors in a dry place and protect them from impact and moisture.
Plan Installation Safely
Relay replacement involves potentially hazardous mains voltage and compressor startup current. Unplug the appliance before handling it, avoid exposed conductors, and follow the wiring diagram and terminal markings. The supplied instructions for the three-pin kit specifically recommend professional maintenance technicians, power disconnection, and protective gloves.
If the old part is badly melted, discolored, or shows signs of overheating, investigate the cause before installation. A relay can fail because of compressor strain, voltage problems, capacitor issues, or wiring faults. Correcting only the visible component may not restore reliable cooling.
How to Use and Care for Your Relay Switch for Refrigerator
Before removing the old relay, record the wire positions and photograph the assembly. Unplug the refrigerator or remove its power supply as directed in the appliance documentation, then compare the replacement’s terminals, resistance, part number, and connector arrangement with the original. If the wiring diagram is available, use it to confirm each connection rather than relying on wire color alone.
Transfer the compatible replacement into the correct mounting position and reconnect the wires according to the terminal markings and service diagram. Keep the overload protector and run capacitor in the positions and orientations prescribed by the manufacturer. Do not force a connector, alter terminals, or use a relay whose pin count or electrical rating does not match the compressor system.
Restore power and observe the appliance without leaving it unattended for long. Listen for normal compressor startup, check that the relay and protector remain cool, and confirm that both the refrigerator and freezer begin cooling as expected. Repeated clicking, repeated short cycling, unusual heat, or continued warmth should prompt power isolation and further diagnosis rather than immediate replacement of another component.
Frequently Asked Questions
What does a refrigerator relay switch do?
A refrigerator relay switch helps the compressor start by controlling the electrical connection used during startup. Its behavior and protective role vary by design, and many refrigerators also use a separate overload protector and run capacitor. Replacing a relay can restore operation when it is the failed component, but it cannot repair compressor, wiring, controller, or refrigerant faults.
Can I use a one-pin relay instead of a three-pin relay?
No, a one-pin relay should not be assumed to work in a three-pin system. The pin count reflects the circuit and connector arrangement, so using the wrong part can prevent operation or create unsafe conditions. Match the old component’s part number, resistance, pin count, wire layout, and electrical rating before making a replacement.
How do I identify the correct overload protector?
Check the old protector’s part number, current rating, horsepower rating, and physical terminals against the replacement kit. Some options cover 1/6-horsepower, one-half-horsepower, or a broader stated range, and the relay may have its own separate maximum-current limit. A higher-current compressor requires appropriately rated protection rather than a protector selected solely by appearance.
Will a new relay fix a refrigerator that is still warm?
A new relay may restore cooling if the relay is preventing the compressor from starting and no other fault is present. A warm refrigerator can also result from compressor failure, capacitor problems, controller faults, wiring issues, or refrigerant-related concerns. Rule out those possibilities or confirm the relay diagnosis before spending time on a replacement.
Is a relay-and-capacitor assembly easier to install than separate parts?
A combined assembly can simplify sourcing and help ensure the two parts correspond to the intended design. It still must match the refrigerator’s model and wiring, and the old connector or wires may need to be transferred correctly. A dedicated assembly is not automatically compatible with a visually similar generic PTC starter.
What does a 4.7-ohm relay mean?
It identifies the resistance specification of the PTC starter relay. The correct replacement should have the same resistance and compatible electrical behavior, but matching resistance alone is insufficient. Pin count, part designation, terminal arrangement, voltage, and current capacity must also agree with the original component and compressor system.
Why does my refrigerator click every few minutes?
Repeated clicking can occur when the compressor attempts to start but fails to complete startup, and a relay or overload protector may be involved. It can also indicate compressor, wiring, controller, or other system problems. If the clicking continues after replacing a correctly matched relay, the appliance needs deeper electrical or mechanical diagnosis.
Can a mini-fridge relay be used in a full-size refrigerator?
Only if every relevant specification matches, including part design, resistance, pin count, voltage, horsepower, maximum current, and physical connection. A mini-fridge PTC starter should not be selected merely because both appliances share a brand name. Use the full-size refrigerator’s model and original component information to make that decision.
Final Thoughts on Choosing the Best Relay Switch for Refrigerator
The BlueStars W10613606 assembly is the leading dedicated choice for a refrigerator confirmed to use that relay-and-capacitor design. The QP2-4R7 three-pin kit stands out for compatible compact appliances requiring a three-terminal starter and overload protector, while the QP2-4.7 two-pin kit offers a focused solution for correctly rated two-pin systems.
For the remaining selections, prioritize exact fit over package size. One-pin kits are widespread but must match the 4.7-ohm one-terminal format and appropriate current rating. The W10197428 and W10662129 combination suits specific major refrigerators with the stated interfaces, and multi-set packages are most valuable when several appliances share the same configuration.
Before ordering, locate the refrigerator model and old part number, count the terminals, check resistance and voltage, and confirm compressor horsepower and current requirements. If the relay is overheated or discolored, investigate why rather than assuming the component alone caused the failure. These checks are the most important steps in choosing a relay switch that can genuinely restore reliable cooling.