KitchenAid Dishwasher Error Code 3-2

Error code 3-2 signals a shorted temperature sensing circuit. The control board is detecting a resistance reading from the thermistor circuit that indicates either a genuine incoming water temperature above 167°F (75°C) or a short condition in the sensor, wiring, or control board input. The dishwasher will not operate normally until the fault is diagnosed and resolved.

No, you should not attempt to run the dishwasher while code 3-2 is active. The temperature sensing circuit is used by the control to regulate water heating during wash cycles. Operating without a functioning temperature sensor could result in overheating or improper cycle performance. Disconnect power until the fault is repaired.

A reset accomplished by unplugging the dishwasher or cutting power at the breaker for a few minutes may temporarily clear the code, but it will return as soon as the control runs a diagnostic or begins a cycle if the underlying short is still present. Resolving the 3-2 code permanently requires identifying and fixing the shorted component, wire, or connector that caused it.

Some causes of the 3-2 code are accessible to a knowledgeable DIYer. Checking the incoming water temperature at a tap and inspecting visible wiring for obvious damage are reasonable first steps. Testing the thermistor with a multimeter after disconnecting power requires basic electrical knowledge but is achievable without specialized tools. Replacing a shorted thermistor is a straightforward parts swap, but if the control board itself is at fault, many homeowners prefer to have a technician handle that repair.

Repair cost depends heavily on the failed component. Replacing a thermistor is typically the least expensive fix, with parts generally ranging from $15 to $50 and professional labor adding $75 to $150. If damaged wiring or connectors are the cause, labor to locate and repair the short may run $100 to $200. A faulty control board is the most costly outcome, with parts and labor potentially totaling $200 to $400 or more depending on the specific model.