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

By | August 15, 2019

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
If the problem is not fixed the error will likely come back.

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

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 a mini split is having 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.
Another thing that can case problems is a unit wired wrong or wiring that has a short or open.
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.



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

  1. Amindharsi

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

  2. ahmad

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

  3. joe

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

  4. zulfiqar ahmed

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

  5. mansoor

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

  6. 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

  7. 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.

  8. 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.

  10. TAMMY cabana

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

  11. 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.

  12. 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.

  13. Bobby

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

  14. 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.

  15. 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

  16. Alex Georgefski

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


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