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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

Joseph, The defrost bimetal is a possibility, but not likely, based on your post description. You most likely have a clogged or frozen defrost drain trough or drain tube. The defrost water doesn' t drain, accumulates in the trough, and overflows out the evaporator cover. You'll need to access the defrost trough in the freezer, and remove the ait tunnel cover at the back of the refrigerator ceiling. use a turkey baster, hot water and a flexible line (trombone cleaner, large-diameter trim line from a weed eater, and clear and flush the drain tube, then install the 819043 D/F Drain Heat Probe and check both doors for proper closure and seal.

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Answered by AppliancePartsPros.com   |   Wednesday, October 23, 2019

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