GE Dishwasher Error Code C1: Temperature Sensor Replacement
Updated: February 2026
When your GE dishwasher shows error C1 , it has detected a problem with the temperature sensor (thermistor). This sensor monitors water temperature and ensures proper heating during wash cycles.
Why C1 Appears
The thermistor is a resistor that changes resistance based on temperature. The control board monitors this resistance to determine water temperature. When the thermistor fails, provides readings outside normal range, or has wiring issues, the C1 error displays.
Diagnosis and Replacement Guide
- Step 1: Turn off power to the dishwasher at the circuit breaker. Remove the bottom rack for access.
- Step 2: Remove the lower spray arm by pulling upward. Take out the filter assembly and set aside.
- Step 3: Locate the thermistor, typically mounted in the sump area near the heating element. It looks like a small sensor with two wires.
- Step 4: Disconnect the thermistor wires and test with a multimeter set to ohms. At room temperature (68°F), it should read approximately 50,000-60,000 ohms.
- Step 5: If readings are infinite or zero, the thermistor is faulty. Order a replacement using your GE model number.
- Step 6: Remove the old thermistor (usually held by a clip or screw) and install the new one in the same position.
- Step 7: Reconnect wiring, reassemble components, and restore power. Run a test cycle to verify the C1 error is cleared.
Thermistor replacement is straightforward and costs between $20-40. This repair restores proper temperature monitoring and prevents the dishwasher from running ineffective cold water cycles.
In Summary: The most important thing about GE Dishwasher Error Code C1: Temperature Sensor Replacement is getting the basics right. Apply the tips above and you will avoid the most common pitfalls.
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Frequently Asked Questions about GE Dishwasher Error Code C1: Temperature Sensor Replacement
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