Error code reference

Whirlpool Washer Error Code 9-1

Slow drain

Slow drain — obstructed drain hose/path, open winding on drain pump motor, loose/open connection in Drain Motor Circuit, drain pump impeller fractured, or faulty drain motor drive circuit on control.

First step from the service manual

1. Unplug dishwasher or disconnect power. 2. Check for blockages from sump check valve to customer's plumbing (plugged garbage disposal, blocked/stuck sump or drain loop check valve, plugged hoses).

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

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Get the full diagnostic procedure for 9-1.

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

9-1 on my Whirlpool WTW5000DW

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Slow drain — obstructed drain hose/path, open

From Tech Sheet W17991045, p.17:

1.1. Unplug dishwasher or disconnect power. 2. Check for blockages from sump check valve to customer's plumbing (plugged garbage disposal, blocked/stuck sump or drain loop check valve, plugged hoses).

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 W10876537

Drain pump assembly

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First step from the service manual

Get the full diagnostic procedure for 9-1.

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