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Customer Questions and Answers for Thermostat, Defrost by Whirlpool

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    • Part Number: AP4069031
    • MFG Part Number: 61002992
    • Made by: Whirlpool
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For Whirlpool Thermostat, Defrost (Part Number: AP4069031)

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freezer portion not defrosting, refrigerator getting warm. how and what should i test for. heating element reads zero on ohm meter thermostat inline with heater reads 1. how do i check thermostat, and circuit? no voltage reading between blue wires coming into freezer and leaving on yellow bypassing defrosting equipment.

Kurt for Model Number mtb2156dew

ANSWER Kurt, Does 0 mean an open circuit(infinite resistance) on your particular meter ? Sounds like you have a bad defrost heater element. The defrost thermostat should be a "closed" circuit, if coverred with ice on submerged in a cup of ice water. The defrost cycle works like this, power(120 VAC) is supplied to the thermostat from the D/F timer. from the thermostat to the heater(white wire), through the heater element, and out or back to the timer(yellow wire)the defrost timer closes the circuit to neutral and back to the outlet. I'm pretty sure you'll have this figured out and repaired in no time. Thanks and Good Luck. 

Answered by AppliancePartsPros.com   |   Monday, July 18, 2011

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