How To Fix a Mini Split P0 Error Code

Several things can cause a P0 error code on a mini split, and of course, the error can be manufacture specific.

The most common fix is to turn the unit off at the breaker for 2-5 minutes, resetting both indoor and outdoor condensers.

There can be a difference in errors depending on a manufacturer and model, so always verify your mini split error code with the manual for the unit.

Steps To Fix a Mini Split P0 Error Code

1. Power Off the Unit.
2. Turn the Power Off at the Breaker for 2-5 minutes resetting the entire system.
3. Turn the Power On and see if the error goes away.

Resetting the whole system is the first step and often solves the problem.

If the error comes back, below are more advanced things that can cause the error.

Possible Causes of P0 Error Code

• Improper Wiring
• Loose Wiring Connections
• IPM Error
• Outdoor Fan Motor
• System Pressure Error
• Faulty Main PCB
• Bad Ventilation of Outdoor Unit

Main Components to Test with a P0 Error Code

• Check Wiring Between Main PCB and Compressor


Check the wiring going from the main PCB and the compressor for any loose connections.

• Check the Outside Fan and Condenser

Check the outside fan is working which should kick on and off.

Also, check the outside condensing unit fins for blockage from dirt or other debris.

• Check the Wiring between the Indoor and Outdoor Unit

Check the wiring for any loose connections which can cause a bad signal.

Both the inside and outdoor units plugs can be checked to see if any wires have become loose.

• Test the Compressor

Test the compressor wiring for any shorts and voltages are correct.

• Test the Main PCB Board

The PCB boards can also cause a P0 error and may need testing.