Unit displays F05; may be associated with defrost control issues in heating mode.

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

Faulty outdoor coil sensor, Incorrect defrost sensor mounting, Outdoor PCB defrost logic fault, Refrigerant flow issues

Safety first: Turn off power before accessing outdoor components.

Step 1 – Check outdoor coil sensor: Ensure the thermistor is properly attached to the coil and wiring is intact.
Step 2 – Clean outdoor coil: Remove heavy frost, ice, or debris that may affect sensor readings.
Step 3 – Power reset: After cleaning, power-cycle the unit and test in heating mode.
Step 4 – Technician evaluation: If F05 persists, a technician should verify sensor readings, defrost cycle timing, and refrigerant charge.

Hard 4/5

Outdoor Coil Temperature Sensor

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