Honeywell Condenser Coil Sensor Error (Alternate Code)

Honeywell AC displays F3 and may not cool efficiently or may shut down.

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

Failed condenser thermistor, Sensor not in contact with coil, Wiring harness damage, Defective main PCB

Safety: Unplug the unit and allow it to cool.

Steps:

Access condenser: Remove rear or side panels to reach the warm condenser coil.
Verify sensor mounting: Ensure the sensor is clipped or taped to the condenser tubing or fins. Re-secure if loose.
Inspect wiring and connector: Repair any damaged wires and reseat the connector on the control board.
Test sensor: Measure resistance and replace the condenser sensor if faulty. If F3 remains, replace the main PCB.

Hard 4/5

Condenser Temperature Sensor

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