F10
Liebherr
Heat Pump System Fault (Compressor / Refrigerant Circuit)
Dryer does not heat or heats weakly; F10 displayed, especially on heat pump models.
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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 heat pump compressor, Faulty compressor start device or relay, Blocked heat pump condenser coil, Low refrigerant charge or leak
How to Fix / Troubleshooting
Safety first: Unplug the dryer. The heat pump system is a sealed refrigerant circuit; only certified technicians should open or recharge it.
- Clean air paths: Ensure the condenser/heat exchanger and all air channels are free of lint and dust. Restricted airflow can cause heat pump errors.
- Listen for compressor operation: During a cycle, the compressor should start after a short delay and produce a low humming sound. If it never starts, suspect the compressor or its start device.
- Check condenser fan: Verify that the internal condenser fan runs when the compressor should be operating. A failed fan can cause overheating and F10.
- Visual inspection: Look for oil stains on refrigerant lines, which may indicate a leak. Do not attempt to repair the sealed system yourself.
- Professional service: If cleaning and basic checks do not clear F10, contact an authorized Liebherr service technician for sealed system diagnosis and repair.
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Repair Difficulty
Professional Required
5/5
Required Part
Heat Pump Compressor Assembly
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