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Customer Questions and Answers for Defrost Bimetal by Whirlpool

4.89 (64)
By: Whirlpool
Part Number: OEM18027960
Manufacturer Part Number: WP4387503

The Defrost Bimetal is an OEM part for Whirlpool refrigerators. It acts as a safety thermostat that monitors and controls the temperature during the defrost cycle. This component ensures that the defrost heater turns off when the evaporator coil reaches a specific temperature, preventing overheating and potential damage.

Causes of failure may include a malfunction due to wear and tear over time, electrical failure, or damage from moisture and ice.  

Symptoms of a bad Defrost Bimetal include:

  • The refrigerator is constantly running without cycling off
  • Frost buildup on the evaporator coils, leading to reduced cooling efficiency
  • The refrigerator or freezer compartment is too warm
  • Unusual fluctuations in refrigerator temperature

This OEM Whirlpool part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper and some Kenmore models.

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Questions & Answers

For Whirlpool Defrost Bimetal (Part Number: OEM18027960)

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Answer

Steve, With the defrost timer having been replaced, the most likely cause for this issue would be caused by a faulty operating thermostat. This would be the only other part aside from there being a floating restriction in the sealed system that would cause the unit to stop working and thaw then refreeze.

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Answered by AppliancePartsPros.com   |   Monday, July 6, 2015

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