KitchenAid Dishwasher Error Code 3-1

Error code 3-1 indicates an open or faulty condition in the temperature sensing circuit. The control board is not receiving a valid signal from the temperature sensor, which monitors water temperature during wash and dry cycles. The cause can be a failed sensor, a broken or disconnected wire, a corroded connector, or in rare cases, a fault on the control board itself.

It is not recommended to continue running the dishwasher while this error is active. Without a working temperature sensor, the control board cannot properly regulate water heating, which could result in insufficient cleaning, failure to sanitize, or potential overheating. Address the fault before resuming normal use.

Resetting the dishwasher by disconnecting power may temporarily clear the error code display, but the code will return if the underlying fault in the temperature sensing circuit has not been repaired. A reset does not fix a failed sensor, broken wire, or corroded connector. Proper diagnosis and repair of the faulty component is required to resolve the error permanently.

A knowledgeable DIYer can diagnose and fix this error in many cases. Start by running the Service Diagnostic Cycle, then disconnect power and use a multimeter to check the temperature sensor resistance and the continuity of the wiring harness and connectors. If the sensor reads open or a connector is visibly damaged, those parts can be replaced without specialized tools. Control board replacement is more involved and may warrant a professional technician.

If the repair is a temperature sensor replacement, parts typically cost in the range of $15 to $50 depending on the model, plus any labor if a technician is hired. Connector or wiring repairs are generally inexpensive in parts cost but may require labor time for diagnosis. A control board replacement is the most expensive scenario, with parts ranging from $100 to $300 or more and additional labor costs on top of that.