Bi-Metal Defrost Thermostat
Part # WP4387490·Whirlpool·Refrigerator

Bi-Metal Defrost Thermostat

The WP4387490 is a bi-metal defrost thermostat for Whirlpool refrigerator. Basic tools needed. Compare prices from top sellers.

Replaces: 2176941, 2183073, 4387490, 586200, 9791823, AP6009313, SL7490, WP4387490VP
Moderate Repair

Fits 8 brands

Whirlpool
Maytag
Amana
Estate
Kenmore
Roper
Crosley
IKEA

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Price Comparison

5 stores · Updated May 16, 2026
AmazonLowest
$12.32
4.7(0)In Stock
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Part Advantage
$15.00
4.8(728)In Stock
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PartSelect
$32.63
4.5(13.6k)In Stock
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ApplianceParts Pro
$32.64
4.8(21.9k)In Stock
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RepairClinic
$38.34
4.4(3.1k)In Stock
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This Refrigerator Defrost Thermostat is a safety device that clips onto the evaporator in the freezer. The thermostat turns off the defrost heater in case it gets too warm in the freezer section. If your refrigerator does not defrost, replacing the thermostat may alleviate this issue. To access the part, open the freezer door and remove the shelves, mounting brackets (if they release), and the ice bucket. After you remove the back panel, the defrost thermostat is mounted to the end of the evaporator. 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.

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
•  Tools Needed: Multi screwdriver, wire splicing tool

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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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