Kenmore Dryer Error Code F3E2

F3E2 indicates that the exhaust thermistor circuit has shorted and the control board is reading a resistance below 500 ohms, which corresponds to a temperature above 250 degrees Fahrenheit. The exhaust thermistor monitors the temperature of air leaving the drum through the exhaust duct. This fault causes the dryer to stop normal operation to prevent potential overheating. The thermistor itself, its wiring, or its connector are the most likely sources of the problem.

It is not recommended to continue running the dryer while F3E2 is active. The exhaust thermistor is a safety-related sensor that helps the dryer regulate heat and detect overtemperature conditions. With a shorted thermistor, the control board cannot accurately monitor exhaust temperature, which means a genuine overheating event could go undetected. Discontinue use until the sensor and its wiring have been inspected and repaired.

If only the exhaust thermistor needs replacement, parts typically cost in the range of $15 to $40 depending on the specific model. If a technician performs the repair, expect total costs including labor to fall in the range of $100 to $200. Wiring harness repairs can vary widely depending on the extent of the damage. A control board replacement, if required, is the most expensive scenario and can range from $150 to $350 or more for parts alone.

Disconnecting power to the dryer for a few minutes may temporarily clear the error code, but F3E2 will return if the underlying thermistor short is still present. The fault is triggered by a hardware condition, specifically a resistance reading below 500 ohms, so the code will reappear as soon as the dryer runs a cycle and the control board reads the sensor again. A proper repair requires diagnosing and correcting the thermistor or wiring fault.

Begin diagnosis with the thermistor circuit test outlined in TEST #4a of the dryer's service documentation, which involves measuring resistance at the thermistor terminals. Check the wiring harness between the thermistor and the control board for pinched or shorted wires, and inspect the connector for corrosion. If the thermistor itself tests below 500 ohms at room temperature, it needs to be replaced. Also verify the exhaust duct is clear, since a genuine airflow restriction can cause real overheating that contributes to sensor damage.