Kenmore Dryer Error Code F2 E4 — Exhaust Thermistor Short Circuit
What this means
The F2 E4 error code on Kenmore dryers indicates the exhaust thermistor has a short circuit — its resistance is reading far below the expected value. This typically means the sensor element has failed internally or the sensor wires are touching each other or shorting to the dryer frame. The dryer will shut down because it cannot accurately monitor exhaust temperature.
Alternate codes: F2E4
Step-by-step fix
3 stepsAccess the exhaust thermistor
Unplug the dryer. Remove the rear panel or lower front panel to access the exhaust thermistor on the blower housing or exhaust duct.
The thermistor is a small sensor — do not confuse it with the larger cycling thermostat or high-limit thermostat.
Test the thermistor for a short
Disconnect the thermistor wires. Measure resistance — at room temperature it should read approximately 10,000–50,000 ohms. A reading near 0 ohms confirms a short circuit. Also test each wire to the dryer frame for a ground short (should read infinite).
If the thermistor reads correctly at the sensor end, check the wiring for areas where insulation has worn away and bare wire is touching metal.
Replace the thermistor
If the thermistor reads near 0 ohms, replace it. Remove the mounting hardware, install the new sensor, and reconnect the wiring.
Route the sensor wires away from sharp edges or heat sources to prevent future insulation damage.
When to call a professional
If replacing the thermistor and checking the wiring does not clear the error, the control board's sensor input may be damaged.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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