H3
AEG
Compressor Overload Protection / Overheat
H3 displayed; unit stops and may not restart until power is cycled.
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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
High ambient temperature and poor ventilation, Blocked outdoor coil, Failing compressor, Incorrect refrigerant charge, Faulty overload protector
How to Fix / Troubleshooting
Safety: Overheating compressors can be dangerous. Turn off power and allow the unit to cool.
- Improve ventilation: Ensure the outdoor unit has adequate clearance and is not installed in a confined space without airflow.
- Clean coil: Gently clean the outdoor coil fins with a soft brush and low-pressure water.
- Check fan: Confirm the outdoor fan runs at full speed when cooling. Replace the fan motor if it is slow or intermittent.
- Allow cool-down: Leave the unit off for at least 30 minutes, then restart. If H3 recurs quickly, internal compressor or refrigerant issues are likely.
- Technician required: A professional should check compressor current, thermal protector, and refrigerant charge.
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Repair Difficulty
Professional Required
5/5
Required Part
Compressor Overload Protector
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