Luxaire variable‑speed AC shows P3; compressor may not start or may run at very low capacity.

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 compressor current sensor, Loose sensor harness, Faulty inverter PCB

Safety: Inverter diagnostics should be performed by a trained HVAC technician.

Inspect harness: With power off, check the harness between the compressor and inverter board for secure connections and no visible damage.
Do not bypass sensors: These sensors protect the compressor. Bypassing them can cause catastrophic failure.
Professional diagnosis: A technician will use Luxaire service tools to read inverter fault history and determine whether the sensor or board must be replaced.

Professional Required 5/5

Compressor Current Sensor

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