F4
Liebherr
Cavity Temperature Sensor Short Circuit
Display shows F4 and oven stops heating; fan may still run.
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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
NTC sensor shorted internally, Moisture ingress into sensor probe, Pinched or damaged sensor cable, Shorted sensor connector at control board
How to Fix / Troubleshooting
Safety first: Isolate the oven from the mains supply before inspection.
Diagnosis steps:
- Access the temperature sensor at the rear of the cavity or from the back panel.
- Disconnect the sensor from the harness.
- Measure resistance at room temperature. A shorted sensor will show near 0 Ω.
- If shorted, replace the sensor with the correct Liebherr NTC probe.
- Inspect the cable route for crushed insulation or contact with sharp metal edges; repair or replace damaged wiring.
- Check the control board sensor connector for corrosion or bridging between pins; clean or replace as needed.
After replacement, clear the error by disconnecting power for 1–2 minutes, then test a low-temperature program.
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Repair Difficulty
Medium
3/5
Required Part
Oven Temperature Sensor (NTC Probe)
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