Kelvinator Inverter Module Temperature Protection

Kelvinator inverter split AC displays P4 and may not start the compressor.

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.

Possible Causes

Overheated outdoor PCB, blocked PCB compartment ventilation, failed inverter heatsink fan (if equipped), degraded thermal paste on IPM

Safety: Turn off power before opening the outdoor unit.

Steps:

Clean PCB area: Remove dust buildup around the inverter PCB and heatsink.
Check any small fans: Some models have a small fan cooling the PCB; ensure it runs properly.
Improve ventilation: Ensure the outdoor unit is not enclosed in a tight space.
Technician tasks: Inspect the inverter PCB temperature sensor and IPM; replace PCB if overheating persists.

Professional Required 5/5

Outdoor Inverter Power PCB

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