Jenn-Air Dryer Error Code F3E1 — Exhaust Thermistor Open/Short
What this means
Error F3E1 on Jenn-Air dryers indicates the exhaust thermistor (temperature sensor at the exhaust duct) is sending a signal outside the expected range. An open circuit means the sensor wire is broken or disconnected; a short circuit means the sensor resistance has dropped to near zero. The dryer may not start, or it may shut down mid-cycle because it cannot accurately monitor exhaust temperature. This is a safety-critical sensor that prevents overheating.
Alternate codes: F3 E1
Step-by-step fix
3 stepsLocate and access the exhaust thermistor
Unplug the dryer. The exhaust thermistor is typically located on or near the exhaust duct housing at the back of the dryer (inside the rear panel). Remove the rear access panel screws and set the panel aside. The thermistor is a small sensor with two wires, usually mounted on the blower housing or exhaust duct.
On Jenn-Air dryers, the exhaust thermistor is usually a different component from the cycling thermostat — make sure you are testing the right sensor.
Test the thermistor with a multimeter
Disconnect the two wire connectors from the thermistor. Set your multimeter to the 20K-ohm resistance range. At room temperature (about 72°F / 22°C), a working thermistor should read approximately 10,000–12,000 ohms. An open circuit (OL / infinity) or near-zero reading confirms a faulty sensor.
Thermistors are temperature-sensitive resistors — their reading should change if you warm them with your hand. No change in reading confirms a dead sensor.
Replace the exhaust thermistor
Remove the mounting screw holding the thermistor to the duct housing. Pull the sensor out. Install the new thermistor in the same position, secure the mounting screw, and reconnect the wire harness. Reinstall the rear panel and restore power.
Thermistors are inexpensive and easy to replace — always replace rather than attempting to repair a faulty sensor.
When to call a professional
If the new thermistor also throws F3E1, the wiring harness between the sensor and the control board may have a break or short. A technician can trace the wiring circuit to find the fault.
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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