Kelvinator inverter split AC shows F4 and outdoor unit may not run correctly.

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

Defective condenser thermistor, sensor detached from coil, damaged harness, outdoor PCB failure

Safety: Turn off power before opening the outdoor unit.

Steps:

Access coil area: Remove the outdoor unit side or top panel to access the condenser coil.
Find sensor: Look for a thermistor clipped to the condenser coil tubing.
Check attachment: Ensure it is firmly clipped and making good thermal contact.
Inspect and test: Check wiring for damage and measure resistance. Replace the sensor if faulty.
PCB check: If a new sensor does not resolve F4, the outdoor PCB may need replacement.

Hard 4/5

Condenser Coil Temperature Sensor

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