Error code reference

Whirlpool Dishwasher Error Code 3-2

Thermistor/OWI temperature sensing circuit shorted

Whirlpool codesWhirlpool dishwasher codes

Thermistor/OWI temperature sensing circuit shorted - incoming water temperature above 71°C (160°F), shorted connection or component in temperature sensing circuit, shorted or faulty temperature sensor, or faulty temperature sensor input on control.

First step from the service manual

1. Check incoming water temperature. 2. Check operation of temperature sensor in Service Diagnostic cycle. 3. Unplug dishwasher or disconnect power. 4. Check all components and connections in the Temperature Sensing Circuit.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 3-2 means on a Whirlpool dishwasher

The 3-2 error code on a Whirlpool dishwasher signals that the control board has detected an abnormal condition in the Temperature Sensing Circuit. Specifically, it indicates either a shorted connection or component within that circuit, a shorted or faulty temperature sensor (NTC thermistor), a faulty temperature sensor input on the control board itself, or incoming water temperature exceeding 75°C (167°F). A short in this circuit causes the sensor signal to fall outside the expected resistance range, prompting the board to throw the fault and halt or interrupt normal operation.

For homeowners, this error means your dishwasher's built-in thermometer is either reporting water that is dangerously hot (above 167°F) or is sending a bad signal to the dishwasher's brain because of a wiring problem or a failed sensor. The temperature sensor tells the dishwasher when the water is hot enough to wash and sanitize dishes properly. When this sensor shorts out or reads extreme values, the dishwasher cannot safely manage its heating cycle and flags the fault. In most cases the temperature sensor itself or its wiring harness is the culprit, and replacing the sensor resolves the issue. Less commonly, the control board's sensor input circuit has failed.

Source: manufacturer service documentation.

Common causes of 3-2

  1. 01

    Shorted or failed temperature sensor (NTC thermistor)

    Part replacement

    The temperature sensor can develop an internal short, causing it to send a signal that reads as an extremely low resistance value to the control board. This triggers the 3-2 code even when water temperature is normal.

  2. 02

    Incoming water temperature above 75°C (167°F)

    Wiring / connection

    If the hot water supply entering the dishwasher exceeds 167°F, the temperature sensor is working correctly but the water itself is too hot, which triggers the fault. This can occur if the home's water heater is set abnormally high or a mixing valve has failed.

  3. 03

    Shorted or damaged wiring in the Temperature Sensing Circuit

    Part replacement

    A pinched, chafed, or melted wire in the harness connecting the temperature sensor to the control board can create a short to ground or to another wire, producing a false low-resistance reading that mimics a shorted sensor.

  4. 04

    Faulty temperature sensor input on the control board

    Part replacement

    If the sensor and all wiring test within normal resistance specifications but the 3-2 code persists, the control board's sensor input circuit has likely failed internally. This is the least common cause and requires control board replacement.

See the test procedure for each cause

Frequently asked questions about 3-2

What does error code 3-2 mean on a Whirlpool dishwasher?
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.
How do I fix error code 3-2 on my Whirlpool dishwasher?
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.
Is it safe to use my Whirlpool dishwasher when the 3-2 error code is active?
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.
How much does it cost to repair a Whirlpool dishwasher 3-2 error code?
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.
How do I test the temperature sensor to diagnose the 3-2 code on a Whirlpool dishwasher?
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.

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