Refrigerators

Refrigerator Defrost Thermostat Replacement Guide

The defrost thermostat monitors the evaporator coil temperature and signals the defrost heater to turn on and off. It prevents the heater from overheating the freezer compartment during the defrost cycle.

BlueStars W10225581 Refrigerator Bimetal Defrost Thermostat Replacement - Compatible with Whirlpool Kenmore - Replaces WPW10225581 PS1175067
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BlueStars W10225581 Refrigerator Bimetal Defrost Thermostat Replacement - Compatible with Whirlpool Kenmore - Replaces WPW10225581 PS1175067

  • IMPORTANT NOTE: Please check the model number carefully before ordering to make sure it is suitable for your refrigerator. If you are unsure about the compatibility, you can send us your refrigerator model number, we ...
  • MODEL NUMBER: W10225581 Refrigerator Bimetal Defrost Thermostat
  • EASY TO INSTALL: It is made exactly fit for most top name brands (Whirlpool, Kenmore, KitchenAid, Maytag, Amana, Roper, Estate, Crosley, Inglis, Magic Chef), and replaces part numbers: AP6017375, 2149849, 2161331, 217...
  • PREMIUM QUALITY: The replacement part is made from durable high quality material and well-tested by the manufacturer - Meet OEM standards - Ensure long lasting and effective operation. The function of the defrost bi-m...
  • SAVE TIME AND SAVE MONEY: Inexpensive way to fix or repair a refrigerator. If your refrigerator does not defrost properly you can test both the thermostat and the heater to figure out which part is at fault. For this ...
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What the W10225581 does

The defrost thermostat monitors the evaporator coil temperature and signals the defrost heater to turn on and off. It prevents the heater from overheating the freezer compartment during the defrost cycle.

Symptoms when this part fails

  • Excessive frost buildup on evaporator coils
  • Refrigerator or freezer is too warm
  • Refrigerator runs constantly
  • Food thawing in freezer
  • Water leaking inside or outside

Compatibility

Fits the Maytag family. Specifically:

  • Any unit originally equipped with OEM part number(s): WPW10225581, AP6017375, 2149849, 2161331, 2176066, 2188824, 2196155, 2266066.
  • Check the model/rating plate inside your appliance and compare it against the fitment table on the product listing before ordering — this guide does not list specific compatible models because Amazon does not provide verified fitment data through this pipeline.

Also replaces: WPW10225581, AP6017375, 2149849, 2161331, 2176066, 2188824, 2196155, 2266066

Tools you'll need

  • Screwdriver (Phillips or flathead)
  • Nut driver
  • Wire strippers (if splicing)
  • Pliers
  • Multimeter

Difficulty: Moderate · Time: 45-90 minutes

How to install the W10225581, step by step

  1. Unplug the refrigerator from the power outlet.
  2. Empty the freezer compartment and remove shelves.
  3. Remove the rear panel inside the freezer to access the evaporator coil.
  4. Locate the defrost thermostat clipped to the evaporator coil.
  5. Disconnect the wires and remove the old thermostat.
  6. Connect the new thermostat and clip it onto the coil.
  7. Reassemble the freezer panels and plug in the refrigerator.

Related troubleshooting

If swapping this part doesn't fix the issue, check these next:

Disclaimer: This guide is for informational and educational purposes only. Always disconnect power before working on appliances. If you're not comfortable with any step, call a qualified appliance technician.
The Appliance Aid Team

Researched and written by the Appliance Aid Team. We work from manufacturer service documentation, parts specifications and owner reports — not hands-on repairs. How we pick products.