42-Degree Defrost Thermostat
The 12001937 is a 42-degree defrost thermostat for Whirlpool refrigerator. Basic tools needed. Compare prices from top sellers.
Replaces: 1023500, 67001202, 67002571, 8170904, AP4009073
Moderate Repair
Fits 4 brands
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6 stores · Updated May 16, 2026
Lowest$50.62
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$51.22
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$54.32
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$74.08
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This Refrigerator Defrost Thermostat is a safety device that clips onto the evaporator in the freezer. The Defrost Thermostat turns off the defrost heater in case it gets too warm in the freezer section. If your refrigerator does not defrost, replacing this part may alleviate the issue. Replacing the element will require basic hand tools, some disassembly of the refrigerator and novice repair experience. You must unplug the appliance or shut off the house circuit breaker for the appliance before installing this part. Recommended Item: Wire Splicing Tool; 8-1/4-in. This stripper specializes in stripping and cutting wire. This tool is designed with a lean nose for pulling and looping wire and equipped with precision ground cutters.
Part Specification
• This product is a Factory Certified Part. These three words represent quality parts and accessories designed specifically for your appliance. Time tested engineering that meets our strict quality specifications
• This product is a replacement part
• Package contains (1) Refrigerator Defrost Thermostat Kit
• Tools Needed: Multi screwdriver, needle-nose pliers, wire splicing tool, 1/4" nut driver
Part Specification
• This product is a Factory Certified Part. These three words represent quality parts and accessories designed specifically for your appliance. Time tested engineering that meets our strict quality specifications
• This product is a replacement part
• Package contains (1) Refrigerator Defrost Thermostat Kit
• Tools Needed: Multi screwdriver, needle-nose pliers, wire splicing tool, 1/4" nut driver
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Common Problems This Part Fixes
Freezer section too warm
Fridge and Freezer are too warm
Fridge too cold
Freezer too cold
Freezer not defrosting
Fridge runs too long
Will not start
Repair difficulty: Moderate - basic tools and 1-2 panels to remove
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