GE Washer Error Code Thermistor

The Thermistor error means the control board cannot detect the Automatic Temperature Control (ATC) thermistor, which is the sensor responsible for monitoring incoming water temperature. Without a valid signal from this sensor, the ATC system is disabled and the washer reverts to fixed, pre-programmed fill temperatures instead of dynamically adjusting the water mix. The washer will continue to operate, but the actual water temperature may not match your selected setting. Testing resistance at control board connector J12 is the first step in diagnosing the fault.

A power reset may temporarily clear the error code, but if the underlying cause is a failed thermistor, damaged wiring, or a loose connector, the fault will return as soon as the control attempts to read the sensor again. A reset is useful for confirming whether the fault is intermittent, but it is not a fix. The thermistor circuit needs to be diagnosed and repaired for the error to go away permanently.

Repair costs vary depending on the failed component. A replacement ATC thermistor is generally an inexpensive part, and total repair costs including labor typically range from around $75 to $175 if the thermistor is the only issue. If the control board needs to be replaced, costs can range from $200 to $400 or more depending on the board and labor rates in your area. Having a technician diagnose the fault before ordering parts helps avoid unnecessary expenses.

Yes, the washer will still run when this error is present. However, because the ATC system is disabled, the machine cannot precisely control water temperature, so the water entering the drum may be hotter or cooler than the cycle you selected. For temperature-sensitive loads such as delicates or heavily soiled items, results may be inconsistent until the fault is repaired.

This fault is not a safety hazard in the same way as electrical shorts or structural failures. The washer defaults to pre-programmed fill temperatures rather than shutting down, so there is no risk of overheating or flooding caused by this specific error. That said, incorrect water temperatures can damage certain fabrics or reduce cleaning effectiveness, so the issue should be addressed in a timely manner.