EF3
Frigidaire
Exhaust temperature sensor (thermistor) fault
Frigidaire dryer displays EF3 and may not heat correctly or may shut down.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed exhaust thermistor, Open or shorted thermistor wiring, Loose thermistor connector, Defective main control board sensor circuit
How to Fix / Troubleshooting
Safety First: Disconnect power before accessing the blower housing or control board.
- Locate exhaust thermistor:
- Typically mounted on the blower housing or exhaust duct.
- Inspect wiring and connector:
- Check for loose, corroded, or burnt connectors.
- Look for damaged or pinched wires.
- Test thermistor:
- Disconnect the thermistor and measure resistance at room temperature.
- Compare to the service manual spec; replace if open, shorted, or out of range.
- Check continuity to control:
- Ohm the harness from thermistor to main control board.
- Replace faulty parts:
- Install a new thermistor if defective.
- If wiring and thermistor are good, replace the main control board.
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Repair Difficulty
Medium
3/5
Required Part
Exhaust Thermistor
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