Question about LG LS-L1210CL Mini Split Air Conditioner

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Unit constantly makes a clicking noise.

I have a LG artcool air conditioner in my bedroom. The unit constantly makes loud clicking noises that keeps us awake. The noises are not always the same volume, and not in any pattern. Driving me crazy.

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  • thompsonkj Dec 30, 2008

    Thanks for the prompt response. I think it does. The air-con is an LG artcool.

  • johnsamuel37 Feb 12, 2009

    I have 2 Mitsu Heavy Industries, one in the living room and one in the bedroom. The one in the living room is perfectly alright. However, the one in the bedroom keeps clicking 15 times every 10 minutes, so it is impossibe to sleep. But there is a pattern to this madness. While cooling at 20 degrees it is quiet, while heating at 30degrees it is quiet. It is just in between temperatures. The mechanic from Mitsu, said that a) if I keep the bedroom door close, it will make sound. b) the wall unit inside was not level but very slightly slanted (sloppy installer) c) yes, it was the heating rod that caused the clicking. I wish some mechanic would open the wall unit so that I could see what is making the sound. I wish they would tell you this when you purchase the equipment.

  • AmbrishSheth May 15, 2009

    15 May 2009

    I have a Voltas Vertis Gold 2 ton AC installed in the living room. It hardly makes much noise when the ambient/room temperature is really high. However, when the room temperature starts nearing the upper end of the temperature range that can be set ( 17 - 30 degrees Centigrade) i.e. whe it is around 31-32 degrees Centigrade and you switch on the AC, it makes all sorts of clicking, ticking noises of varied volumes. The noises emanate sometimes several times a minute and are very disturbing.

    Somebody told me that the noises are the cracking noises of discharging capacitors which are sub-standard in quality. So I got the best capacitors available and replaced them on the PCB. Sorry to say, but it idin't help. I tried removing all the screws on the different plastic parts and panels so as to allow for some movement between them while expanding and contracting but that didn't help too. Even completely removing the front cover did not help, nor inserting rubber washers beneath all the screws.

    Needless to say, I'm still trying.

    If any of you have a solution or an idea, do let me know.
    If I find a solution, I'll do the same.


  • David Robinson May 11, 2010

    Does this unit have the electronic filter on it?

  • kamsakmndsvkljnfv
    kamsakmndsvkljnfv Mar 09, 2014

    JOSHMEUL37 can you please email me? I'm having same exact problem with the unit and it's driving me crazy and you're the only person on the whole internet who's having same issues so I need to talk to you.

  • Anonymous Mar 31, 2014

    when air conditioner is on the inside unit makes a wind type noise blowing out



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Electronic filters use static dicharges to filter the air. Unfortunately the make that clicking noise when they discharge. LG calls it a plasma filter. Clean both the regular and the plasma filter to see if that helps.

Posted on Dec 30, 2008

  • 1 more comment 
  • David Robinson Dec 30, 2008

    Also LG says that the front panels make a cracking sound due to expansion and contraction from temperature changes. Sorry, your stuck with that sound. Anything else just ask. Please remember to rate me so I know if I'm helping. Thanks.

  • AmbrishSheth Jun 04, 2011

    4 June 2011
    Dear dmr0dmr,
    Sorry for the delay in posting this reply.
    After reading your suggestion, I removed the ion filters from my AC. That helped significantly to reduce the the clicking / ticking noises. Thank you very much.
    However, after a couple of hours of operation, light ticking noises do arise. Would you please guide about what might be the reason & suggest a solution.
    Thanking you, once again, in anticipation

  • David Robinson Jun 06, 2011

    Light ticking noises could be just normal expansion / contraction noises from the evaporative coils. Unfortunately with this type of design where the coils are in the room with you as opposed to a central air conditioning system where the coils are farther away and separated by duct work, you will hear all of the changes in the metal and surrounding plastic. As far as a solution, I don't believe you can eleminate the ticking noises without changing the physical properties of the materials used to construct your A/C system. This is a diplomatic way of saying , "that's just the way it is". If it is light tcking then everything is working fine and you should embrace the sound as a verification of operation. If the ticking gets louder or consistant in frequency and volume then you may have a problem with your fan.
    I wish I could travel to your location to witness exactly what you are experiencing so I could give you a definitive explanation.
    If you want to contact me directly and email me pictures, videos or any other way of helping me know exactly what you are experiencing then send them to
    I would be very happy to help you in any way that I can.



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