H2
Tosot
Compressor Overheat Protection in Heating
Display shows H2, heating performance is poor or unit stops
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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
Low refrigerant charge, Blocked indoor airflow, Blocked outdoor airflow, Faulty discharge temperature sensor
How to Fix / Troubleshooting
Safety first: Turn off power before cleaning.
- Clean indoor filters and coil: Ensure unrestricted airflow inside.
- Clean outdoor coil: Remove debris and wash the coil fins.
- Check discharge sensor: Inspect the compressor discharge sensor and wiring for damage.
- If H2 persists: A technician should check refrigerant charge and compressor condition.
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Repair Difficulty
Hard
4/5
Required Part
Compressor Discharge Temperature Sensor
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