Kenmore Dryer Error Code F3 E1 — Inlet Thermistor Open Circuit
What this means
The F3 E1 error code on Kenmore dryers indicates the inlet thermistor — which monitors the temperature of air entering the drum — has an open circuit. This sensor is critical for temperature regulation. Without accurate inlet temperature data, the control board cannot properly modulate the heating element. The dryer will shut down or not heat.
Alternate codes: F3E1
Step-by-step fix
3 stepsLocate the inlet thermistor
The inlet thermistor is typically located on the heater housing or near the air inlet area at the rear of the drum. Access varies by model — some require rear panel removal, others require removing the top and front panel.
The inlet thermistor monitors air going INTO the drum, while the exhaust thermistor monitors air LEAVING the drum. They are in different locations.
Test the thermistor
Unplug the dryer. Disconnect the thermistor leads and test resistance with a multimeter. At room temperature, expect 10,000–50,000 ohms. An infinite (OL) reading confirms an open circuit.
Also test the connector and wire continuity back to the control board to rule out a broken wire.
Replace the inlet thermistor
Remove the old thermistor from its mounting position. Install the new sensor and reconnect the wiring. Reassemble the dryer and run a test cycle.
Run the dryer on a timed heat cycle for 5 minutes and verify it heats properly after the repair.
When to call a professional
If the thermistor and wiring both test correctly but the error persists, the control board's sensor input circuit may need professional diagnosis.
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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