KitchenAid Dishwasher Error Code F3E2

F3E2 indicates a fault in the temperature sensing circuit, typically caused by a shorted or failed thermistor, damaged wiring in that circuit, or incoming water that exceeds 167°F (75°C). The control board monitors the thermistor continuously and stops the cycle when it detects an out-of-range or shorted signal. Diagnosis involves checking the sensor, all related wiring, and the actual hot water supply temperature.

Running the dishwasher while this fault is active is not recommended. The control has halted the cycle because it cannot reliably monitor water temperature, which means it cannot regulate heating properly. Continuing to operate the appliance in this condition could result in wash performance issues or potential overheating.

A reset may temporarily clear the code, but if the underlying fault in the temperature sensing circuit is still present, the error will return as soon as the control performs its next sensor check. Resetting without addressing the root cause will not resolve the issue. A proper diagnosis of the thermistor, wiring, and incoming water temperature is necessary for a lasting fix.

Some steps are accessible to a knowledgeable DIYer. You can check the incoming hot water temperature at the tap and inspect visible wiring for obvious damage without specialized tools. Testing the thermistor and connectors with a multimeter requires some electrical comfort level. Replacing the thermistor is a moderate DIY repair, but if the control board is at fault, professional service is recommended.

Repair cost depends on the root cause. A replacement thermistor is generally an inexpensive part, with the repair falling in the range of $100 to $200 including labor if a technician is hired. Wiring repairs vary based on the extent of damage. Control board replacement is the most expensive scenario, typically ranging from $200 to $400 or more with labor.