F3
Liebherr
NTC Temperature Sensor Fault (Drum / Exhaust)
Dryer runs briefly then stops; F3 error appears, often with no heat or incorrect temperature.
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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
Open-circuit NTC sensor on heater housing, Shorted NTC sensor, Loose or corroded NTC connector, Damaged wiring harness between NTC and control board
How to Fix / Troubleshooting
Safety first: Unplug the dryer and allow it to cool completely before working near the heater or exhaust duct.
- Access the NTC sensor: On many Liebherr dryers, the NTC is mounted on the heater housing or exhaust duct at the rear or base. Remove the rear panel or lower front access panel as applicable.
- Inspect wiring: Check the two-wire connector to the NTC. Ensure it is firmly seated and free of corrosion or heat damage.
- Test the NTC: Disconnect the sensor and measure its resistance with a multimeter at room temperature. Compare to the service manual spec (commonly around 5–20 kΩ at 20–25°C). Infinite or near-zero resistance indicates a faulty sensor.
- Check harness continuity: If the NTC tests good, check continuity from the NTC connector back to the main control PCB. Repair any broken or pinched wires.
- Replace if faulty: If the NTC is out of spec, replace it with the correct Liebherr temperature sensor. Reassemble panels, restore power, and run a test cycle.
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Repair Difficulty
Medium
3/5
Required Part
Drum/Exhaust NTC Temperature Sensor
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