Whirlpool Dishwasher Error Code 4-3 (cause 2)

Error code 4-3 cause 2 indicates a failure in the Control Motor Drive circuit or the Sense circuit that is preventing the wash motor from operating. Unlike cause 1 of this code which points to the motor itself, cause 2 is diagnosed when the wash motor tests with normal resistance but still receives no power. The fault lies within the control board's ability to drive or monitor the wash motor circuit.

The dishwasher will not run a wash cycle with this fault active, so continued use is not possible until the issue is resolved. You should disconnect power to the unit while performing any diagnostic or repair work on the control board or wash motor wiring.

Resetting the dishwasher by disconnecting power may temporarily clear the displayed code, but the underlying circuit fault in the control board will cause the error to return as soon as the unit attempts to operate the wash motor again. A proper repair addressing the drive or sense circuit failure is required to resolve the code permanently.

A knowledgeable DIYer can perform the initial diagnostic steps, which involve unplugging the dishwasher and using a multimeter to check resistance across the wash motor circuit. If the motor checks out and wiring connections are secure, the repair requires replacing the control board, which involves disconnecting multiple wiring harnesses. Comfort with electrical components and basic appliance repair is recommended before attempting this repair.

If the repair requires control board replacement, parts typically range from $100 to $300 depending on the specific model. Professional labor to diagnose and replace the control board can add $100 to $200 to that cost. Checking and reseating wiring connections first costs nothing and should always be done before purchasing parts.