Whirlpool Dryer Error Code F3 E3 — Inlet Thermistor Failure
What this means
The F3 E3 error code on Whirlpool dryers indicates the inlet thermistor — the temperature sensor that monitors the temperature of air entering the dryer drum — has failed or is reading values outside the expected range. This sensor helps regulate drying temperature. When it fails, the dryer may not heat properly, overheat, or shut down mid-cycle to protect against unsafe temperatures.
Alternate codes: F3E3
Step-by-step fix
4 stepsDisconnect power and access the thermistor
Unplug the dryer or turn off the circuit breaker. Remove the lower front access panel (for front-load dryers) or the rear panel to access the blower housing area. The inlet thermistor is typically located on the blower housing.
Gas dryers should have the gas supply valve turned off in addition to the electrical supply.
Test the inlet thermistor
Disconnect the thermistor's wire connector. Use a multimeter set to ohms to measure the resistance across the thermistor terminals. At room temperature (about 77°F), a functioning thermistor should read approximately 10,000 ohms (10K).
If the reading is 0 ohms or infinite (OL), the thermistor has failed and needs replacement.
Inspect the wiring
Follow the wires from the thermistor to where they connect to the main control board. Check for any damaged, burned, or disconnected wires. Repair or replace any damaged wiring.
Heat from the dryer can degrade wire insulation over time — look for any brittle or discolored sections of wire.
Replace the inlet thermistor
If the thermistor tests faulty, remove it from the blower housing by releasing the mounting clip or screws. Install the new thermistor, reconnect the wire connector, and reassemble the access panel.
The thermistor is an inexpensive part (usually under $20) and is quick to replace — it's not worth trying to repair a faulty one.
When to call a professional
If replacing the thermistor does not clear the error, the main control board may be failing to read the sensor correctly, requiring 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.
Learn more about our sourcesParts you may need
Links may earn us a commission at no extra cost to you. We only recommend parts relevant to this repair.