How to Fix Whirlpool Dishwasher Error F20

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⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.

Error Code: Dishwasher Difficulty: Moderate

Problem: Main Control Board (Power Supply)

⚖️ Repair Decision

⚠️ CHECK WARRANTY / AGE

$100 – $250 Range

How to Fix Dishwasher Error

Disconnect power at circuit breaker.
Remove control panel cover and lower access panel.
Document all wire connections with photos and written labels.
Disconnect all wire harnesses from both control boards (main and interface).
Remove mounting screws from both boards (8 total).
Carefully remove old boards.
Install new control boards in proper locations, ensuring correct orientation.
Reconnect all wire harnesses exactly as documented – triple-check each connection against photos.
Secure mounting screws to 6 inch-pounds.
Reinstall panels.
Restore power and enter service mode to initialize new boards (press Hi-Temp, Air Dry, Hi-Temp, Air Dry).
Run complete diagnostic cycle and clear error codes.
Test all cycle functions thoroughly with water to verify proper operation.

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OEM Part #: W10595569

Estimated Market Price: $150-$250

If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.

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Appliance Type

Appliance Age

Estimated repair cost (parts, or parts + labor) Most DIY parts are $50–$250. If you have a quote, use the total.

Is it under warranty?

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