Error code reference

Whirlpool Dishwasher Error Code FC

ASA (Water Softener Electronics) defective

Whirlpool codes Whirlpool dishwasher codes

ASA (Water Softener Electronics) defective - electronics detect high electrical resistance in the resin (indicated only during active test program).

First step from the service manual

Check cables on water softener detectors for breaks or weak contacts; check cables from control board (ASA) to WHS electronics on water softener.

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

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Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
Verified part numbers when replacement is required

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FC on my Whirlpool WDT730PAHZ

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ASA (Water Softener Electronics) defective

From Tech Sheet W12673797, p.49:

1.Check cables on water softener detectors for breaks or weak contacts; check cables from control board (ASA) to WHS electronics on water softener.

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part WPW10804018

Electronic control board

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First step from the service manual

Get the full diagnostic procedure for FC.

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