Speed Queen Dryer Error Code SHORTED THERMISTOR ERROR

This error means the output board detected a temperature greater than 210°F (99°C) while the drive motor was running, which it associates with a shorted thermistor. The thermistor is a resistive temperature sensor, and when it shorts, its resistance drops in a way that signals an extreme temperature to the control board. The dryer stops normal operation as a protective response. The root cause may be the thermistor itself or an actual overheating condition in the appliance.

You should not continue running the dryer until you have identified the cause of the error. If the dryer is genuinely overheating due to restricted airflow or a failed thermostat, operating it could create a fire hazard. If the cause turns out to be only a faulty thermistor giving a false reading, the risk is lower, but that distinction requires hands-on diagnosis before assuming it is safe to proceed.

Disconnect power to the dryer before testing. Locate the thermistor, disconnect its wiring harness, and use a multimeter set to measure resistance (ohms) across the thermistor terminals. A shorted thermistor will show near-zero resistance rather than the expected resistance value for the ambient temperature at the time of testing. If the reading is zero or very close to it, the thermistor has failed and needs to be replaced. Also inspect the connector and wiring for corrosion or damage before condemning the thermistor itself.

The error can be cleared by pressing any cycle selection pad, but only after the sensed temperature has dropped below 210°F and at least 15 seconds have passed. Simply unplugging the dryer may not permanently resolve the issue if the underlying cause is still present. If the error returns after clearing, a faulty thermistor, restricted venting, or a failed thermostat needs to be diagnosed and corrected.

Repair costs vary depending on the root cause. A replacement thermistor is typically an inexpensive part, often in the range of $10 to $30, and is straightforward to install. If the cycling thermostat or output board relay is at fault, parts costs can range from $20 to $150 or more depending on the component. Adding professional labor will increase the total, generally bringing a service call with parts to somewhere between $100 and $300 depending on the repair needed.