How To Fix an EC Error Code on a Mini Split

By | June 14, 2023

How To Fix an EC Error Code on a Mini Split
An EC error code on a mini split usually indicates a Refrigerant Leakage Detection Error.

This means the system has detected a leak.

While there may be a leak in the unit, keep in mind sensors, and boards can also malfunction and cause the EC error code.

This includes Pioneer, Carrier, 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.

Causes of a Mini Split EC Error Code

  • Refrigerant Leak
  • Bad Sensor
  • Bad connection
  • Bad Indoor PCB
  • Bad Outdoor PCB

Several things can cause an EC error with the main problem usually a leak somewhere in the system.

While a refrigerant leak is usually the problem, a bad sensor, connection, or bad PCB can also give the same error.

Causes and Fixes for a Mini Split EC Error Code

  1. Power Cycle Off and On the Unit
  2. Power the unit off and turn the power off at the breaker for 2-3 minutes.

    Turn the power back on; if the error still exists, follow the next step.

     

  3. Check for Refrigerant leak
  4. When looking for a leak, see if there is any oil around connection joints or any spots on the lines.

    Leaks can be found in a few ways, including using soap and water.
    How To Fix an EC Error Code on a Mini Split Leak
    Most HVAC techs will have a refrigerant leak detector that beeps next to a leaking spot.

    If there is a leak, it will need to be fixed, and refrigerant added back into the system.

    Refrigerant is added by looking up the amount a system uses and adding it in by weight using a scale.
     

  5. Bad Sensor or Loose Connection
  6. If the sensor that detects refrigerant goes bad, it will give an EC error.

    A loose connection can also give the same result.

    Check all the wiring connections and be sure they are fitted into place and not loose.

  7. Bad Indoor or Outdoor Main PCB
  8. A bad PCB board can also give this error.

    Check all other options before replacing a PCB board.

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.

20 thoughts on “How To Fix an EC Error Code on a Mini Split

  1. D victor jacob raju

    AM TAHIR ADV IN PAKISTAN MY AC SHOW THE PROBLEM ERROR EC AFTER COOLING 20@30 MINTS THE AC SHOW THE ERROR EC WHO CAN WE SOLVE THE ERROR EC

    Reply
    1. Herbert Buckingham

      Display code CF on front panel of Carrier mini split in heat mode

      Reply
  2. Jon Burson

    Was showing EC after reset, no more cold air in AC mode

    Reply
  3. Samuel Pyykkonen

    If I have never dealt with this problem, who would I contact so that they could fix it?

    Reply
  4. Habeebu

    Ec error code unit on 15 minutes after coming unit off 5minutes after on going error now normal again after 20 minutes coming Ec error code general Ac unit

    Reply
  5. Tahir

    I AM TAHIR ADV IN PAKISTAN MY AC SHOW THE PROBLEM ERROR EC AFTER COOLING 20@30 MINTS THE AC SHOW THE ERROR EC WHO CAN WE SOLVE THE ERROR EC

    Reply
  6. Ibrahim Mohammed Wajid (Present Branch CIVIL/C.E)

    EC meaning?

    Reply
  7. Emmy Gabriel

    My AC showing CE no more cooling what could be the problem?

    Reply
  8. Herbert Buckingham

    carrier mini split heat mode is not working. CF is on the display

    Reply
    1. Lee Makhathini

      Maybe it is overcharged, reduce the refrigerant to 80 psi and see how it goes

      Reply
  9. SURESH

    Md shariq:. Please check Compressor amps and working fine, maybe pumping problem,
    Today also same issue I faced , TRANE 410 GAS, 1.5 TON,,,
    I check and confirm the compressor getting high amps , so I request replace new compressor ,,, I am working in Dubai,

    Reply
    1. hvac tech

      today same problem compressor i check getting high amps 56 after trip compressor 3 unit sem error code EC BUT SEM UNITS GETTTING AMPS 56 AFTER TRIP …MEANS COMPRESSOR HAVE PROBALM

      Reply
  10. Md shariq

    My split ac show error EC i have check completely but no leakage no sensor fault no pcb fault but i when checked gas presser he has been going 60 – 25 psi liquid 150psi and some time 100psi section line and liquid line 100 psi and after five minutes later compressors off but fan is working then i have also checked compressors very heat

    Reply
    1. reza

      very bad
      and we have this problem too .

      what is the reason .

      Reply
  11. Abdul qayoom

    I have Orient’s AC which gives EC error after 1hour or 2hour what is this fault

    Reply
    1. Okyere Richmond

      It is low or high gas, but the main is leakage of refrigerant.

      Reply

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