How To Fix a Mini Split F0 Error Code

By | June 16, 2023

How To Fix a Mini Split F0 Error Code
If you have a Pioneer or ComfortStar mini split that gives an F0 error code, it is a Compressor Overload Current Protection error.

Several things can cause an F0 error code on a mini split, and the error can be manufacturer specific.

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

This includes Pioneer, ComfortStar, and more units but be sure to check the error codes for your specific unit.

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

Steps To Fix a Mini Split F0 Error Code

  1. Power off the unit.
  2. Turn the power off at the breaker for 2-5 minutes, resetting the unit.
  3. Turn the power back on and see if the error clears.

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.

Causes of F0 Error Code

  • Improper Wiring
  • Loose Wiring Connections
  • Power Supply
  • System Blockage
  • Fan Malfunction
  • Faulty Main PCB
  • Compressor Malfunction

How To Fix a Mini Split F0 Error Code Causes

Components to Test with F0 Error Code

  • Check Power Supply
  • The first step is to be sure the power supply is getting the correct voltage.
    How To Fix a Mini Split F0 Error Code Power Supply
    Using a multi-meter, check the input volt and verify they are correct.

    The correct input voltage will be in the manual and on the outside condensing unit tag.

  • Check the Outside Fan and Condenser
  • Check the outside fan is working which should kick on and off intermittently.
    How To Fix a Mini Split F0 Error fan
    Also, check the condensing 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.
    How To Fix a Mini Split F0 Error Code Wiring
    Both the inside and outdoor plugs can be checked to see if any wires have become loose.

  • Check the Amps on the Power Supply are Correct
  • Using an amp-clamp or similar, check the amp and be sure they are correct.
    How To Fix a Mini Split F0 Error Code AMPS

  • 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 an F0 error and may need testing.
    How To Fix a Mini Split E1 Error Code PCB

Video on F0 error Code at Minute 1:36

Category: Mini split heating and cooling air conditioner heat pump systems

About Aaron H. Benetti

Aaron H. Benetti an HVAC technician who has worked in the field since 1991. He began his career as an HVAC installer and later began doing troubleshooting and repairs. Around 2010, he began to write books on HVAC topics, mainly tutorials and how-to information. Currently, Aaron works as an HVAC tech and also writes many articles and posts for websites as well as books and videos on HVAC topics.

4 thoughts on “How To Fix a Mini Split F0 Error Code

  1. Richard Mangion

    Same thing ,I thing this type is faulty from the maker.

  2. Damilola Adedokun

    Am tired of this product have done different things.even d engineer came n check it . It’s keep on displaying fo. After I off it n on it again it will work for some minutes then it’s display again.

  3. GiGi

    Unit installed 1 summer ago, only a yr n a half old and FO code with no cold air. Checked for leaks with proper gages. Changed inside sensor. Moving to outside compressor sensor next. If not that all piping has to come down. Anyone else have this issue. I have a Gree 18000 btu mini split

    1. Chris

      same problem, same product. on our second unit in 6 months. same problem again.


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.