Error code reference

Whirlpool Washer Error Code 6-4

Inlet water

Inlet water - float switch open / overfill condition detected.

First step from the service manual

Remove any items stuck under float. Verify that the float moves freely and you hear the click of the switch contacts. Check levelness of dishwasher.

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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M+ Max·Whirlpool Washer

6-4 on my Whirlpool WTW5000DW

M+

Inlet water - float switch open / overfill

From Tech Sheet W17993925, p.17:

1.Remove any items stuck under float. Verify that the float moves freely and you hear the click of the switch contacts. Check levelness of dishwasher.

2.Measure the inlet valve coil resistance at the valve connector. Expected: 1,000 to 1,200 ohms per coil at room temperature.

3.Verify static water supply pressure at the inlet hose. Below 20 psi or fluctuating supply commonly triggers fill-timeout faults.

Part WPW10212598

Water inlet valve

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First step from the service manual

Get the full diagnostic procedure for 6-4.

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