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Our window AC unit stopped suddenly. Completely dead. The outlet has power. It's a 220V unit. LG window AC LW2510ER Any advise what it could be? Does it shut down when it's 100F outside? Thanks for your help. Matt in St. Louis

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  • mlroeleveld Jul 03, 2011

    It's not a 220V issue. I actually just solved it. i opened the temp control unit on the AC. There was a lot of moisture in there. Dryed that with a paper towel and after that with a hair dryer. Now it's working again.
    It's very hot here in St. Louis and I am sure it has to do with that.

    Thanks for your help.

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It appears that it has froze up. Because it is so warm there, that it most likely just over worked itself and, froze up. Once you let it defrost some, or use hair dryer some to speed process, it should work fine. I hope this helps. Thanks Mike from fixya

Posted on Jul 03, 2011

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No - the outside temperature will not shut the AC down.
You say the outlet has power? Does it have the needed 220 volts? Most of the time 220 volts is on one switch, (that operates both 110 volt legs of power at the same time). - but sometimes each leg is on a separate breaker and if "one leg" trips you will still have power at the outlet (110 volts) but you won't have the needed 220 volts. While this is not likely - it is possible - so I would want to test the outlet with a voltage tester and determine the voltage. You might try checking in your breaker box and seeing if another breaker (110volt) is tripped. The same thing applies if you are dealing with fuses instead of breakers - determine the voltage at the outlet - and if you don't have 220 and only have 110 then look for a blown fuse or as I said above - a breaker tripped.
If you do have 220 at the outlet and nothing is running - I would be looking for an inline fuse of some sort within in the unit. Many of the newer units have them and they are usually easy to spot and all you have to do is to unscrew the fuse holder and replace the blown fuse. Be sure to have the power off when handling fuses.
Note: Be aware that while breakers/fuses can trip and blow without a serious problem going on - they (blown fuses/tripped breakers) are usually a sign of something significantly wrong with the unit.
Good Luck!

Posted on Jul 03, 2011

  • icemelts
    icemelts Jul 03, 2011

    While I sincerely hope your problem 'has been solved,' I seriously doubt that a little moisture inside an electrical box/switch would shut your unit down - and if it did (somehow do that) I would look for a 'return' of your problem and in more serious nature.



    "Moisture" would/could create a 'shorted' condition (if bad enough) that would blow fuses and/or trip breakers (either within the AC itself or remote from it) - but - 'causing the compressor/fan motor to not run' is a highly unlikely event. As I said above - the condition you described would more than likely cause a 'blown fuse or tripped breaker,' and my guess would be that an inline fuse might of blown, which is what should of happened. All this being said - if it really was 'moisture' that caused the unit to shut down - then my question would be 'how?' What safety opened? What switch opened? Doesn't make sense to me. The fact that 'both' compressor and fan motor would not come on - strongly indicates a 'inline fuse' blown. For 'moisture' to cause that - "it would have to cause a interruption of power somehow.



    I would also suspect an 'overload' condition, i.e. compressor motor/fan motor going off on internal overload - then sitting there 'cooling off' (which allows the overload to reset) and thus 'coming back on' and making you think 'everything is ok' - when in actuality - it's not.



    Only thing about that is 'why would both compressor/fan motor go off at the same time?'



    In any event - one can always blame it on a "gremlin," of some sort, yes?




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