Indoor unit shows F5 and the unit may stop or run with poor performance, especially 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

Open or shorted discharge pipe NTC sensor, Sensor not properly attached to discharge line, Damaged sensor wiring

Safety first: Turn off power. The discharge line can be very hot; allow time to cool before touching.

Locate discharge sensor: It is typically strapped to the compressor discharge pipe inside the outdoor unit.
Check mounting: Ensure the sensor is tightly strapped and insulated as originally installed.
Inspect wiring: Follow the sensor wires to the PCB and check for damage or loose connectors.
Replace sensor: If the sensor is cracked, burnt, or F5 persists, replace it with a Haier-specified discharge pipe sensor.

Hard 4/5

Compressor Discharge Pipe Temperature Sensor

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