Error code reference

Frigidaire Dishwasher Error Code E:20

Faulty heat pump motor winding; wash cycle abruptly ends with Clean/Sanitized LEDs lit.

Faulty heat pump motor winding; wash cycle abruptly ends with Clean/Sanitized LEDs lit.

First step from the service manual

Check continuity between heat pump (m2) and power module. Measure heat pump resistance between any 2 terminals (~15.2 Ω at room temp).

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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E:20 on my Frigidaire Dishwasher

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Faulty heat pump motor winding

From Service Manual 155827, p.39:

1.Check continuity between heat pump (m2) and power module. Measure heat pump resistance between any 2 terminals (~15.2 Ω at room temp).

2.Measure drain pump winding resistance at connector J7 on the main control. Expected: 12 to 16 ohms at room temperature.

3.Back-probe the pump driver output under load. Verify the board switches the pump at 120 VAC during the drain portion of the cycle.

Part 5304497818

Drain pump

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