Whirlpool Dryer Error Code Exhaust thermistor shorted

This error means the exhaust thermistor's resistance has dropped below 500 ohms, which the control board interprets as a temperature reading above 250°F. The fault triggers after 1 minute in Run mode or immediately during Factory Diagnostic Mode. It indicates a short circuit in the thermistor itself, its wiring, or its connector. The dryer will typically stop operating normally until the fault is resolved.

You should not continue operating the dryer with this fault active. The control board relies on accurate thermistor data to regulate heat and prevent overheating. With a shorted sensor, the board cannot correctly monitor exhaust temperature, which could lead to improper heating behavior or failure to detect a true overheat condition.

If the thermistor itself is the cause, the part typically costs between $10 and $35, making it one of the more affordable dryer repairs. Professional labor to diagnose and replace the thermistor generally adds $75 to $150 depending on your region and service provider. If the control board turns out to be the root cause, costs rise significantly, ranging from $150 to $350 or more for parts and labor.

A knowledgeable DIYer can diagnose and repair this fault with a basic multimeter. Start by disconnecting power, locating the exhaust thermistor in the duct path, and measuring its resistance at room temperature. If resistance is below 500 ohms, the thermistor needs replacement. Also check the wiring harness and connector for damage or shorts before reassembling.

A power reset may temporarily clear the error code from the display, but the underlying fault will cause it to return once the dryer runs again. Because the error triggers after just 1 minute in Run mode, the code will reappear quickly if the thermistor or wiring is still shorted. A proper repair of the faulty component is required for a permanent fix.