H3
Klimaire
Compressor Overload Protection (Inverter Module Overheat)
Indoor unit displays H3 and the system shuts down, often after running for some time.
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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
Blocked outdoor coil or fan failure causing high discharge temperature, Inverter module overheating due to poor ventilation, Low refrigerant flow causing compressor overheat, Failing compressor or inverter PCB
How to Fix / Troubleshooting
Safety first: Turn OFF power at the disconnect before servicing the outdoor unit.
- Step 1 – Clean outdoor coil: Remove debris and wash the condenser coil with low-pressure water. Ensure fins are straight.
- Step 2 – Verify outdoor fan: Confirm the fan runs at proper speed whenever the compressor is on. Replace the fan motor if it is slow or intermittent.
- Step 3 – Check ventilation: Ensure the outdoor unit has adequate clearance and is not installed in a confined or enclosed space.
- Step 4 – Professional diagnosis: If H3 recurs, a technician should check compressor discharge temperature, inverter module temperature, and refrigerant charge, and test the inverter PCB.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter Module or Outdoor Condenser Fan Motor
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