Error code · Liebherr
F4 · Temperature sensor fault
The F4 error indicates a fault with the temperature sensor. Check if the appliance is too close to a heat source or if the ventilation system is functioning properly.
Fridge freezerCaution — Know When to StopFixLens verified
Safe first steps
- Check the placement of the fridge freezer to ensure it is not near a heat source.
- Inspect the ventilation system around the fridge freezer to ensure it is not blocked.
- If the placement and ventilation are correct but the error persists, consider checking the temperature sensor for visible damage.
- If the temperature sensor shows signs of damage, arrange a service visit — do not use the appliance.
When to stop
- Stop if you notice any unusual smells or if the fridge freezer is excessively hot — risk of fire.
Likely cause
The F4 error indicates a fault with the temperature sensor. Check if the appliance is too close to a heat source or if the ventilation system is functioning properly.
Verification
Reviewed by: automated manual extraction
Verified against Liebherr CFc 1875_996997751 technical documentation
FixLens publishes its own structured technical logic verified against Liebherr CFc 1875_996997751 documentation · last verified April 23, 2026.
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