E4, E5, E6, F1, F2, F3 Error Codes on a Mini Split

By | April 7, 2020

Troubleshooting E4, E5, E6, F1, F2, F3 Error Codes on a Mini Split

If have a mini split unit that gives an E4, E5, E6, F1, F2, F3 error code a few things can cause this problems.

How To Clear an E4, E5, E6, F1, F2, F3 Error Codes on a Mini Split

  1. Power off the unit and turn off the breaker or disconnect.
  2. Wait 2-3 minutes and power the unit back on.

Any problem that is not fixed will likely come back.

Possible Causes of The Errors
E4, E5, E6, F1, F2, F3 Error Codes on a Mini Split Causes

  1. Wiring Mistake or Problem
  2. Bad Sensor
  3. Bad PCB Board

The PCB computer board that controls the mini split is having a problem seeing the correct voltage from the sensors it uses for feedback.

The wiring and many sensors need to be checked to see if they are malfunctioning.

Example: T1 Indoor Room Temperature Sensor
Troubleshooting E4, E5, E6, F1, F2, F3 Error Codes on a Mini Split Pic 2

Example: T2 Evaporator Temperature Sensor

Example: T3 Condenser Temperature Sensor

Example: T4 Outdoor Ambient Temperature Sensor

Example: T5 Compressor Discharge Temperature Sensor


How To Troubleshoot

  • Check each sensor wiring for open or short.
  • Test each sensor resistance.

To troubleshoot a unit the location of the many sensors will need to be known.

This information can be found in the manual for the unit and depending on the manufacture may be available from their website.

It is also possible that the PCB board has gone bad.

If after testing all the sensors and wiring and they show good this usually points to a bad PCB board.

A unit that is wired wrong or wiring that has a short or open can also cause problems.

Most often these errors require a technicians and will be outside the average home DIY job.

If You Have an E6 Error Code Read Here for How To Troubleshoot and Fix It.



39 thoughts on “E4, E5, E6, F1, F2, F3 Error Codes on a Mini Split

  1. AMIT

    ” EF ”

  2. Bilal

    My kenwood eco plus 1 ton ac , display is showing F 3 error code . What may be problem.

  3. Given

    Hy’ my problem is Air-conditioning it is showing me error code F1, my unit is ecoaire hydaway.

  4. Evelyn N. Coyoca

    how to resolve the alarm sign in indoor unit in ceiling cassette.

    1. Arnoldo Ochoa

      My minisplit showing E5 code. Turned off, disconnected from wall, turned off breakwr. After waiting more than 3 mins., still code E5 continues to show!

  5. Justice

    Please what makes the AC relay goes off in 5 minutes time and comes on consecutivily

  6. najim

    one time my NIKAI split ac came E5, then I called technician. The technician check & simply changed Motor, then it working and charged my huge amount
    So, I think it was not Ac Motor problem, right?

  7. zulfiqar ahmed

    i have kenwood split AC eIcon , which is showing error F4 , Can u please guide me how to overcome

  8. Mwebembezi Asaph Kabs

    Am a student of refrigeration course and would like to get articles about air conditioning, troubleshooting and how to fix such problems

  9. mansoor

    what is the error of PO in 1ton dc inverter how to replace it

  10. Shahid khan

    I have daikin heating and cooling inverter ac with 2.2 ton split ac , display is showing F 3 error code . What may be problem

  11. Ratnam

    Dear sir ,Recently purchased cruise tower model ac 3Tr.but cooling is not came ,some error is coming.Shown Error is E5,how to clear this error ,how to get cooling .,please solve the my issue sir.

  12. Alex Georgefski

    What would cause freezing of the indoor unit condensor find near the sensor

  13. joe

    my nu style ac inverter error code f1 can you explan the problem pls

  14. Amindharsi

    My ac not working f3 code showing 10 months back buy this a/c 3 .4 time I completed but not any responses.

  15. ahmad

    If the e1 error code how to overcome it
    I having trouble ac sanyo e1

  16. Salman Shaikh

    Reconnect AC : facing L6 Error how to rectify problem

    where we get the new pcb

  17. Rana Anwaar

    Sir I am using Orient 1.5 ton Split type AC, it was all ok till this year, now its showing E4 error every time I have to turn off the main switch a d switch it on again. I think that outdoor unit is also not turning on…
    Rana Anwaar.


    In blue star 1.5 ton window ac , display is showing F 3 error code . What may be problem.

  19. TAMMY cabana

    Why does my PRIDIOM ZHF/LT-01 have F3 on and how do I get it off

  20. Mubarak hussen

    Hello sir.
    I am Mubarak hussen.ac in charge for seidco company. Sir ineed help.1FCU show the thermostat E06 . what the problem.plece reply me.
    And other spirit ac otometic timer light no off not work condenser unit.13 ac same problem.

  21. Micki

    Gunaire mini split a/c will not come on when outside temp is 70. Heat will not come on when outside temp is 60.

  22. Bobby

    Sir we have more than 600 aftron ac some ac show E6 plse tell me why come that

  23. Baldev singh

    Sir my air conditioner company name ayur in display f2 error plz solve my problems

    1. Abdelrahim Barghothi

      This error usually caused by a malfunctioned fan.
      Check fan motor.

      1. Abdul Majeed

        My dawalance inverter split Ac is showing F1 error. What may be problem.


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