KitchenAid Dishwasher Error Code 9-4
Lower spray arm error
Lower spray arm error - mechanical binding/blocking of spray arm, corroded or loose connection in spray arm sensor or motor circuit, open fuse, spray arm drive circuit on control, or spray arm motor/sensor failure.
First step from the service manual
1. Check for and remove any blockage of lower spray arm. 2. Run the Service Diagnostic cycle and check for LSA operation/fault detection. 3. Disconnect power and check wiring connections at controlled lower spray arm motor and sensor.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
Get the full diagnostic procedure for 9-4.
- 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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