Whirlpool Dishwasher Error Code 3-2

Error code 3-2 means the control board has detected a problem in the Temperature Sensing Circuit. This includes a shorted temperature sensor, a shorted wire in the sensor circuit, a faulty sensor input on the control board, or actual incoming water that is too hot (above 75°C / 167°F). The dishwasher flags this code because it cannot reliably monitor water temperature, which is essential for safe and effective operation.

Running the dishwasher with an active 3-2 code is not advisable. The temperature sensor is what prevents the heating element from overheating the water, and without accurate temperature feedback the control board cannot regulate the wash cycle safely. If the root cause is actually water over 167°F entering the unit, continued use risks damage to the dishwasher's interior components. Address the fault before resuming regular use.

Unplug the dishwasher, then locate the temperature sensor at the bottom of the tub or on the circulation sump assembly. Disconnect its wiring connector and measure resistance across the sensor terminals with a digital multimeter. At room temperature (around 68°F / 20°C), a healthy NTC thermistor typically reads between 10,000 and 50,000 ohms depending on the specific part number. A reading near zero or a direct short indicates a failed sensor that needs replacement. Cross-reference the exact expected resistance with your model's service manual for a precise specification.

Start by checking your home's hot water supply temperature at the kitchen sink with a thermometer. If it is above 167°F, lower your water heater's thermostat. If the water temperature is normal, run the Service Diagnostic cycle to test the temperature sensor's live behavior. Then unplug the dishwasher and use a multimeter to check the resistance of the temperature sensor and continuity of all wiring in the Temperature Sensing Circuit. A shorted sensor typically reads near zero ohms and must be replaced. Replace any damaged wiring or connectors found during inspection.

If the fix is only a temperature sensor replacement, the part typically costs $15 to $40, and it is accessible to a confident DIYer with basic hand tools and a multimeter. If the wiring harness needs repair or replacement, add $20 to $60 for parts. A control board replacement is the most expensive scenario, with boards ranging from $100 to $200 or more depending on the model. Professional labor adds $75 to $150 per hour on average, so diagnosing and replacing the sensor yourself can save significant money if you are comfortable with appliance repair.