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Customer Questions and Answers for High Limit Thermostat by Whirlpool

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    • Part Number: AP3010530
    • MFG Part Number: 661566
    • Made by: Whirlpool
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Questions & Answers

For Whirlpool High Limit Thermostat (Part Number: AP3010530)

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When I run my dishwasher it will run for a short while (10 minutes) and then the fuse will trip in the house. When the fuse is reset the dishwasher will run for a short time and then trip again. It has worked without issue for the previous 2 years. I pulled the heating element and tested it for continuity and it appears to be functioning. Could it be the high limit thermostat?

Dylan W. for Model Number DU945PWSQ0

ANSWER Dylan, There is a slight possibility the hi limit thermostat 661566 could be the issue, but very slight. The hi limit thermostat is a "safety" device that "opens" when the temperature exceeds 170 dgrs. It's more likely that you have a pinched or shorted wire in the harness, when power is applied to the heater circuit, there's a direct short to chassis ground and the breaker trips. You'll need to check the wires from the control board down to the hi limit and from the heater back up to the door switch, especially at the bottom of the dishwasher door, where the wires transfer from the door to the lower components under the tub. 

Answered by AppliancePartsPros.com   |   Monday, August 05, 2013

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