LG Split System Air Conditioner Error Codes – Troubleshooting – Maintenance

61 thoughts on “LG Split System Air Conditioner Error Codes – Troubleshooting – Maintenance”

1. Greg Timourian

   January 9, 2022 at 11:33 pm

   No error codes, but I am getting beeping sound around every 14 minutes. Just wondering what could be causing it .
2. John

   May 25, 2021 at 2:11 am

   LG mini split 186 has error code CH26. Does this require a replacement compressor to correct?
3. Floyd Wile

   March 22, 2021 at 10:04 pm

   I have a lg dual inverter heat pump that is flashing code CH29 what does this mean and is it something that i can reset or fix on my own no tech’s in the area thanks
4. Joseph

   March 8, 2021 at 4:09 pm

   My LG duel interter heat pump model number #LAN120HYV1 is giving me error cod CH37, I cannot locate the issue or find any answers online or in the manual, please help.
5. Graham Mullucks

   January 14, 2021 at 7:07 am

   I have an LG dual inverter air conditioner unit, bought and installed in september 2020, the problem is when switched on heat CH73 comes on and I have to switch power off for 20 minutes, then switch on OK, the outside unit is above front door and water comes out all the time and drops on people at the door. I have this problem every 2-3 days, this is a new unit and should be covered by guarantee. I live in spain but I am English and do not speak spanish.
6. Gopalakrishnan

   December 16, 2020 at 4:51 pm

   Hi guys anyone help me? I have Lg inverter ac 1.5ton, last 3 days I’m facing CH62 error code. I checked the sensor and cleaned and fixed it. 1 day it runs smooth the next day same error came. Anyone can help?
7. Kevin McKee

   October 19, 2020 at 11:24 pm

   Hi. I have a LSN120HEV1, 2 years old. Had a power bump and now the units don’t kick on. I replaced both boards (inside and out) and now the indoor unit has the preheating light lit and the outdoor unit has a solid red LED on the board. I look all over the place for a fix or direction to go but nothing. Can you help?
8. Alok

   July 10, 2020 at 3:23 pm

   Thanks a lot I used LO error code to fix my LG Split AC. The Handbook Did not have LO written against the Test Mode .But your site had it . So very Helpful. Thanks
9. king

   February 16, 2020 at 11:08 am

   My LG aircon neo plasma is flashing and is not cooling like it should.
10. Tunde babs

    December 26, 2019 at 2:51 pm

    The a.c works for 10mins then shows CH21 and stop working. I have to switch it off and on from the socket for it to work again. And still it stops after 10mins
11. Matildo

    December 14, 2019 at 3:17 am

    Error code blinks 1 on the indoor lable and 4 on the timer.
12. Julie Surman

    November 30, 2019 at 7:16 am

    I have a dual heater/ac. There is no error code but on the heat setting the vent almost closes and blows cold air. I have tried all the settings for different positions for the vent but it always goes back to almost closed and blows cold air. I have tried turning off at breaker unit to reset but it still did the same? Any advice grateful.
13. jake

    November 14, 2019 at 11:47 pm

    I had this error and replaced the coolant, 8 weeks later same problem. No idead where to go now
14. akindele akingbogun

    November 7, 2019 at 12:11 pm

    there is leakage during installation of inverter split unit,after fixing the leakage and refilling the unit the CH 38 displayed on the screen even after adding more refrigerant,after a while the system shut down,anytime i try to power the unit the CH 38 will display,pls what is the solution,thanks
15. akindele akingbogun

    November 4, 2019 at 2:34 pm

    i have the same issue as complained above,there is a leakage during installation and the CH 38 show during refilling and the system shut down immediately so should add more refrigerant into the system ? thanks
16. Arun

    October 22, 2019 at 11:11 am

    My LG split unit showing CH 30 alarm code
17. Nasser

    October 19, 2019 at 7:11 pm

    If the refrigerant level goes lower than 40 percent in a case of any leakage, the AC is immediately shut down with an alert of CH 38 on the screen
18. tawanda

    October 15, 2019 at 8:59 am

    LG SPLIT AC error CH23 and error CH35 for 60000 btu inverter ceiling cassette units using R410a.
19. Deanna Hill

    October 11, 2019 at 5:20 pm

    What do I do if heat won’t come on? CH 07. I have 3 units all set the same.
20. Salvador B. Cabansay

    October 3, 2019 at 11:52 am

    I have a LG dual inverter model NT187Sk3, the unit have an alarmed code CH 38, what is the
    cause of this alarm code, several times i checked the unit, i need your opinion about this matter, thanks.
21. Ronald Gardner

    October 2, 2019 at 5:01 am

    I have a LG split air unit that now has a error code of ( CA ) and does not cool. one error code i found says its a Faulty discharge thermistor. How can i find this part on the unit to replace it.
22. mwita marwa

    September 16, 2019 at 11:12 pm

    i have a problem in LG MODEL LT-C-186 ELEI with signal wire when using generator,only the fan fan motor work indoor but in outdoor show no reaction until we use the normal electrical power
23. ibrahim

    July 15, 2019 at 2:05 pm

    i have error code S5 in my split LG dual inverter (model no:BS-Q186K3A1) ,indoor is running n outdoor not working anymore..
24. Ryan

    February 3, 2019 at 1:15 am

    Same problem here, can’t find anything to explain what “ch37” is. Outside temp was a little below zero but windchill here was about 20 below. I’m assuming this was the cause and hoping it’s temporary?!? Outside temp now is in the 30’s and still getting the same error code. Hoping it just needs more time to warm up. Frustrating since this unit is rated to minus 14F!
25. Rick Boyer

    January 30, 2019 at 3:51 pm

    my lg mini split sys. is showing ch37 flashing on inside panel not working it is -23 deg
26. Glen

    January 2, 2019 at 1:35 am

    Hi guys, my Inverter V is showing the communications error with the 5 flashes.

    Is this something I can look at fixing myself? Ie a loose connection somewhere between the indoor and outdoor units?
27. Herschel Alpert

    December 29, 2018 at 11:40 pm

    Anyone have an idea how to repair a code 5 – indoor unit not communicating with outdoor unit? Green LED flashes 5 times. Thanks.
28. Cailean

    December 13, 2018 at 7:51 pm

    I have an LG P18RK EU1 (ASUW186C8A0) unit which just stops. There are three white LED lights but I cannot find any information on the fault codes displayed.

    When the unit stops upper LED (Power) flashes once followed by middle LED (E/control) flashes twice followed by upper LED (Power) flashing once more. Lower LED (Preheat) does not flash.

    Can anybody advise as LG are proving useless?
29. secundino silva

    December 6, 2018 at 8:58 am

    Good morning, I also have the same problem with my wall mounted device LG has the error code CH 38 and I can not find the resolution of this problem
30. David Evans

    November 15, 2018 at 6:49 pm

    I have a C6 error. We are experiencing an ice storm. I can’t get to the outdoor unit because there is ice on the rooftop. The indoor unit has shut down. Is it possible that the ice has incapacitated the unit? Will I simply need to wait for the snow to melt or should I do something else?
31. Genevieve Buot

    November 7, 2018 at 1:29 pm

    I have an error code CH 10
    What to do please?
32. daryl

    November 2, 2018 at 1:47 pm

    lg lan180 and lau180hsv no heat,the power light is on the preheat light is on the fan is running but no heat with remote set to heat and temp set to 80 have any idea? are there any troubleshooting manuals available? i’m having a hard time finding info on these units can you direct me to info sites or availability

    thanks
    dl
33. Shaunak Patel

    October 5, 2018 at 5:50 am

    LG split AC
    Error code is CH – 51
    What is the problem ?
34. Howard Houston

    September 28, 2018 at 7:50 pm

    Just installed 3 6000 and 1 18000 units, new condenser,
    units cool fine . . . but when in auto mode units do not cool or heat, been told all units must be in same mode for them to work . . . this is NOT TRUE. they don’t work correctly except in cool mode.
    Only one tech on LG ductless havoc mili splits in 200 miles . . . am stuck with them to keep my guarantee alive. LG has proven to me to have one of the weakest electircal designs in the business. . . why would one on a mini split with 4 heads have to operate all of them in same mode? defeats the reason to have individual room haves. ABOUT DECIDED that LG is total junk . . . i am out 5000, will have to spend another 7000 for a mitsubishi product that have several local techs and works.
35. Bruce Clark

    September 26, 2018 at 10:06 pm

    I have an error code CH46 showing on my indoor unit, What should I check on the outside unit?
36. carl c

    September 21, 2018 at 7:08 pm

    my lg ac does the same thing shows error code ch 38 shuts down i have 5 of the same models this is the only one that does it Why
37. Luke Chavez

    July 31, 2018 at 4:31 pm

    I have a 2 unit LG ductless mini split (LSN090HSV4-Living room, LMN078HVT-bedroom). The entire condenser turns off after running for a little while and both units will flash 3x (LED1/Heating) and 5x (LED2/Cooling). I don’t find the code or codes for this error message. Since the main condenser goes off and both flash the same error code, I’m assuming it’s something with the entire system. Could anyone please advise and help?! I’d really appreciate any insight. THANKS!
38. H Kip

    July 4, 2018 at 8:20 am

    We have a problem with the LG Split System Air Conditioner. The indoor unit gives error code C5. The outdoor unit does not work. Can you indicate which part needs to be replaced?
39. Steve

    July 3, 2018 at 6:06 pm

    On the indoor mini split I’m getting error 42, bad low sensor.. how do I check
40. Ahmed

    May 26, 2018 at 4:33 pm

    I’ve a problem LG ceiling cassette air-conditioner… It comes red 1 , green 5. What error code is that????
41. ahmad

    May 1, 2018 at 3:48 pm

    I have LG Split Air Conditioners and this Error Code appear in the indoor unit screen ( P 10 ) I’dont now what is that mean? and the Split not work. Would you please advise what could be the problem?
42. john sorensen

    May 1, 2018 at 3:12 pm

    LG Split Air Conditioner shows error code CH 38.
    Talked with LG Mexico and the error is for lack of Gas, it leaked out.
    Called in the Gas guy, refilled and found leak, and now the AC works again. Nice.
43. Rakshit Agarwal

    December 25, 2017 at 8:02 am

    I have the same problem on my new AC LG Smart Inverter model no. JS-Q12MPXD.
    As soon I switch it on it shows an error of CH38 and doesn’t work.
44. Sk marskule

    December 1, 2017 at 9:49 am

    I HAVE 1.5 TONNE LG DUAL INVERT ER SPLIT AC. GIVEN ERROR CODE CH12 AND SOME TIMES CH10, PLEASE SEND ME SOLUTION . AC UNDER WARRANTY CONDITION.
45. Steve Gregory

    November 29, 2017 at 1:21 am

    What do I check for a 5flash communication error other than grounds and wiring for LG AC? These two seem to be good. What about the computer board? How do I troubleshoot that?
46. Jarrod Rumley

    November 28, 2017 at 9:46 pm

    I have a LG split unit. I have changed the board and fan motor per lgs request. The outside unit still does nothing. I also have a diagnostic reader and the lights don’t even come on when I hook it up. Does anyone have any ideas?
47. Mukesh Muthreja

    October 19, 2017 at 9:12 am

    My LG 1.5 Ton Split AC is showing CH10 Error Code.
48. Clay

    October 6, 2017 at 4:01 pm

    I have a LG mini split. When you set it for cooling both indoor and outdoor work just fine for about 5 mins. Then indoor flashes communication fault (5) flashes. When you try and shit if off my the remote, the indoor unit display turns off and the supply damper shuts closed but indoor fan keeps running as well as the outdoor unit (compressor and all). Until you kill high voltage.
    lsn186he (indoor)
    Lsu186he (outdoor)
49. Gulnaz

    September 6, 2017 at 6:23 pm

    I have a same problem with my new AC LG Smart inverter modrl LGDM12RP. AC stopped suddenly and it shows CH38? Remote control doesnt react to other options. Would you please advise what could be the problem?
50. Sarthak

    September 2, 2017 at 6:06 pm

    LG inverter ac showing CH 41 whenever i open it what should i do?
51. Pierre

    August 26, 2017 at 10:48 pm

    I have the lsn120hsv4. Whenever it is off, I can hear a low pitch constant squeal from it. It’s very faint but can be heard easily if the house is silent. I know its coming from the unit as it stops when the breaker is turned off. I cannot hear it when its running, just in an off state. Is this normal? It can be annoying once you hear it, hard to stop.
52. Josh Cooper

    August 21, 2017 at 3:33 pm

    I’ll give that a shot – it’s only 3 months old, but it’s a sort-of dusty environment.
53. DIY Project Help Tips

    August 15, 2017 at 11:02 pm

    Josh,
    Sounds like the compressor is faulty.
    Check this LG AC PDF file here and it explains the error code 21.
    OR
    Possibly the filter is dirty and needs cleaned and the ac needs vacuumed out.
    Is the inside of the AC dirty? Pet hair? Dust? Dirt?
    A dirty filter and dusty inner part of the AC can cause multiple error codes.
    Unplug it, Clean it out, wait 30 minutes, and apply power and test it.
    -RR
54. Josh

    August 14, 2017 at 10:59 pm

    My LG mini-split AC system blinks code 21.
    Pressing the buttons on the remote doesn’t do anything.
    After turning off the breaker for a minute and turning back on, it runs for 10-15 minutes, but not nearly as cold as it used to be, then shuts off and blinks 21 again.
    Any ideas?
    The model is LG lsn307hv3.
55. hamid

    August 14, 2017 at 6:50 pm

    i have this promblem to – my LG AC model is -np277sk1-(next plus 2) the newest model of lg ACs – i bought it last week but know some times it showing ch38 and stops working
56. DIY Project Help Tips

    August 11, 2017 at 9:31 pm

    Ibrahim,
    Try this…
    – Remove power to your LG Split System AC Model BS-Q096J3A2 wall unit.
    – Remove front panel and clean the filter and the surrounding areas.
    – Reinstall the AC air filter.
    – Leave AC unplugged for an hour or more.
    – Reapply power to the LG wall unit and run a test…. This should clear the error code CH 38.
    NOTE: Be sure you work safely as certain parts in the AC, even though unplugged, can still be energized.

    Let us know what you find after doing the above.
    -RR
57. Ibrahim

    August 11, 2017 at 9:16 pm

    It only works for 10-20 minutes and then it stops working, then starts showing error code ch 38.
58. DIY Project Help Tips

    August 11, 2017 at 9:07 pm

    Ibrahim,
    What is the issue with your LG Split System AC Model BS-Q096J3A2?
    Still getting error code CH38?
    Is it cooling?
    No power?
    Remote not responding?
    -RR
59. Ibrahim

    August 11, 2017 at 5:49 am

    LG Split System Model BS-Q096J3A2.
60. DIY Project Help Tips

    August 11, 2017 at 12:51 am

    Ibrahim,
    The error code CH38 is not in the database as an error code for LG Split System Air Conditioners.
    Can you tell us the model number of your LG AC?
    We will then research the model number and code and try to find you an answer.
    -RR
61. Ibrahim

    August 10, 2017 at 6:24 pm

    My LG AC shows CH38 after working for 5-10 minutes and then stops working.
    Is this an invented error code?
    CH38 is not on the list.

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