P4
Gree
Inverter Module Overheat Protection
Display shows P4; unit may stop and not restart until cooled down.
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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, Poor ventilation around outdoor unit, Faulty IPM temperature sensor, Overloaded compressor
How to Fix / Troubleshooting
Safety first: Turn OFF power before cleaning or opening the outdoor unit.
- Step 1 – Clean outdoor coil and fan: Remove debris and wash the coil gently. Ensure the fan guard is clear.
- Step 2 – Improve airflow: Ensure adequate clearance and avoid enclosing the unit.
- Step 3 – Technician diagnosis: If P4 recurs, a technician should check IPM temperature readings and may need to replace the outdoor PCB or compressor.
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Repair Difficulty
Professional Required
5/5
Required Part
Outdoor Inverter PCB
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