Author Topic: LWHD1200R Lg win unit top right evap coils freezing / blockage?  (Read 2867 times)

Offline Sajor

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Hi all;
I'm trying to fix my window unit. It's an LG LWHD1200R. It was working great 'till yesterday (100F +) when I got home and found that the upper right quadrant of the evap coil had frozen. Specifically the second coil on the right side. The lower coils are not even getting cold. The fins are a bit clogged in parts, but clear over all. Could this be just dirt? Or could it be a bigger issue? I would take it to a pro for servicing, but I don't have the money at the moment, and it's getting real hot out there. Any help troubleshooting and fixing this unit would be greatly appreciated.

Offline Sajor

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Re: LWHD1200R Lg win unit top right evap coils freezing / blockage?
« Reply #1 on: July 01, 2013, 04:31:12 PM »
Does anybody know if it is possible for the evaporator coils to get blocked inside in window units? I can't think what else would cause for one side of the coil to freeze while the rest remains at room temp. If it where a lack of refrigerant It would still get an even cool on the whole coil right? Do these units have service ports? Any idea what kind of refrigerant the take?

Any help would be appreciated

Offline domain

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Re: LWHD1200R Lg win unit top right evap coils freezing / blockage?
« Reply #2 on: July 01, 2013, 09:46:25 PM »
Low charge equals frost/ice on first few passes/runs of the coil. Many factors overall. Should not have PORTS on this unit.

Offline Sajor

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Re: LWHD1200R Lg win unit top right evap coils freezing / blockage?
« Reply #3 on: July 02, 2013, 09:48:54 AM »
Low charge equals frost/ice on first few passes/runs of the coil. Many factors overall. Should not have PORTS on this unit.

So if it is out of warranty, basically toss it? Seems so wasteful
« Last Edit: July 02, 2013, 09:50:14 AM by Sajor »

Offline domain

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Re: LWHD1200R Lg win unit top right evap coils freezing / blockage?
« Reply #4 on: July 02, 2013, 07:57:51 PM »
this is what we call "Progress" heard that on this site i believe. Go the world!
 :-\

Offline AJ

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Re: LWHD1200R Lg win unit top right evap coils freezing / blockage?
« Reply #5 on: July 02, 2013, 08:20:01 PM »
It's the American way...
Hope you find our site helpful.

Offline Sajor

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Re: LWHD1200R Lg win unit top right evap coils freezing / blockage?
« Reply #6 on: July 03, 2013, 11:07:33 AM »
Well, I guess there is no fixing this, but would you guys mind explaining what is happening to it. Just for the education value of it?

I opened the unit and noticed that the part that is freezing are a couple of very thin tubes that go directly from the bottom of the condenser to the top of the evap coils. The evap coils that are connected to the compressor don't freeze (barely get cold) and the line from the compressor to the condenser barely gets warm.

I think I will at least try to part it out on ebay or something.

Thanks for the replies guys

Offline JWWebster

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Re: LWHD1200R Lg win unit top right evap coils freezing / blockage?
« Reply #7 on: July 03, 2013, 01:21:27 PM »
To see if you have a low charge a simple way to do it is place cardboard over the evaporator and run the window unit on high. The frost should go all the way back to the compressor after 10 or 15 minutes. If it don't then you have a low charge. The pressure on a window unit in my neck of the woods is 68 PSI.
« Last Edit: July 03, 2013, 01:22:31 PM by JWWebster »
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