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

By | May 20, 2023

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

A mini split unit with an E4, E5, E6, F1, F2, or F3 error codes, are similar to each other and is usually a bad sensor or a wiring issue.

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

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.

E4, E5, E6, F1, F2, F3 Error Codes Definitions

  • E4: Indoor room temperature sensor T1 open circuit or short circuit
  • E5: Evaporator coil temperature sensor T2 open circuit or short circuit
  • E6: Indoor Unit EEPROM Parameter Error
  • F1: Outdoor ambient temperature sensor T4 open circuit or short circuit
  • F2: Condenser coil temperature sensor T3 open circuit or short circuit
  • F3: Compressor discharge temperature sensor TP open circuit or short circuit

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 4-5 minutes and power the unit back on.

If a component has failed, the error will likely return.

Possible Causes of E4, E5, E6, F1, F2, F3 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 Mini Split Sensor Locations

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

  • T2 Evaporator Temperature Sensor
  • T3 Condenser Temperature Sensor
  • T4 Outdoor Ambient Temperature Sensor
  • T5 Compressor Discharge Temperature Sensor

How To Troubleshoot E4, E5, E6, F1, F2, F3 Error Codes

  • 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 manufacturer, 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 technician and will be outside the average home DIY job.

If You Have a mini split E6 Error Code, Read Here for How To Troubleshoot and Fix It.

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.

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

  1. Aaron

    Hi. We have the F0 error code in our Panorama split AC, how can we solve it because AC is stop now?

  2. zulfiqar ahmed

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

  3. TAMMY cabana

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

  4. Given

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


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

  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. 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

  8. mansoor

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

  9. joe

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

    1. Noorul Ameen Memon

      Enviro dc ac main F1 error araha Han kid ka error han

  10. RAJEEV G


  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. Bobby

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

  13. Justice

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

  14. 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.

  15. 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?

  16. 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.

  17. Amindharsi

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

  18. ahmad

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

  19. Alex Georgefski

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

  20. Bilal

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

  21. Salman Shaikh

    Reconnect AC : facing L6 Error how to rectify problem

    where we get the new pcb

  22. AMIT

    ” EF ”

  23. 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.

  24. 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!

    2. Md ujjal

      Hello dear all, how are you,
      Dear gental man i am Bangladeshi, i am air condition and electronic tacnicean, i have a diplomatic certificates withan 16years work experience,in Bangladesh and maldives,
      So dear Gental man i need a job from Europe eria,if a posibole so please kindly help me🙏

  25. 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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