H3
Royal Clima
Compressor Overload Protection / Overheat
Indoor unit shows H3, 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
Blocked outdoor condenser coil, Outdoor fan failure, Low refrigerant causing compressor overheating, High ambient temperature with poor ventilation around outdoor unit
How to Fix / Troubleshooting
Safety first: Turn OFF the breaker and allow the outdoor unit to cool before inspection.
- Step 1 – Clean outdoor coil: Remove debris and wash the condenser fins gently.
- Step 2 – Check outdoor fan: Confirm the fan runs whenever the compressor is on. If not, shut down the unit.
- Step 3 – Improve ventilation: Ensure adequate clearance around the outdoor unit and remove any covers or obstructions.
When to call a technician: Persistent H3 indicates possible refrigerant or compressor issues that require professional service.
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Repair Difficulty
Hard
4/5
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