20 Most Recent LG Electronic Window Air Conditioner Questions & Answers

Not sure if this is what you're looking for, but if it might help... I just posted this on a similar issue (water buildup in the front of the unit and/or a rattling noise when the fan is running - sounds like it's running through water and it's spitting water out of the vent). I'm guessing that it's designed similarly to other LG units...

If the unit has been working fine for a long time and then you suddenly have this issue, the angle you have the unit set at is probably fine, but you probably have a blockage of dirt/mud/sludge/whatever that is keeping it from draining properly. Here's what you have to do...

For safety... turn the unit OFF and UNPLUG IT.
Open the front gate and remove the air filter. Next, remove the entire front gate from the unit (probably at least one screw to remove first - mine was in the middle, just under wher the bottom of the air filter sits). With the gate removed you should have access to locate your blockage problem.

There is a hole that allows the water to drain from the front of the unit (the part that is inside your house) to the back of the unit (the part that hangs outside your house) and eventually out of a drain hole in the rear. Chances are that this hole is clogged. So, when the water fills up in the front drip tray it has no access to drain to the back. Consequently, the water builds up in the fan area which causes the rattling noise and the water being picked up by the fan and blown out of the vent. If left too long, it will overflow the front drip tray and make a mess in your house.

On my unit, the hole was on the far left side (if your are in your house and facing the AC unit) of the drip tray. You can use a piece of coathanger wire, or some other long thin instrument to push the blockage through to the rear. Once this pathway from the front of the unit to the back of the unit is clear, your problem should be solved. You will probably still get the sound and water sputter out of the front for a little while until the water that is in the fan area drains/dries out, but it should return to normal soon.

It is probably best to actually remove the unit from the window and take the cover off of it and really clean it out, but that is obviously a much more involved task. If you have a hose, that's fine and will help. Water won't hurt the unit - just keep it away from the electronics (the controls/display/cord). You should also be carful not to bend any of the tiny metal fins... that's just as bad as (actually worse than) being blocked by dirt/dust. And obviously, allow the unit to dry before you put the cover back on and put it back in your window and plug it in to run it. If you are willing to put in the extra time and effort, you can do a more thorough cleaning job, which would help to prevent the problem from happening again too soon. There's no way to prevent dirt/dust from building up in the unit. Once water/moisture is added to the mix, you're dealing with mud/sludge, which is going to eventually block that small drain path. The only solution is to clean it out once in a while.

I figured this out the hard way. I took the thing out of the window cleaned it (not as thoroughly as I thought) and put it back in and then did it all again. The third time I actually found the hole that was blocked. If it hadn't been such a pain taking it all apart and cleaning it the first two times I would have laughed at myself for missing it.

Good luck! Hope this helps!

LG Electronic... | Answered on Oct 02, 2019

randobrad had it exactly for me, the port to the outside was cleared but the one from front to back was clogged. Once I found the small port (using a wire hanger) it was easy.

LG Electronic... | Answered on Nov 22, 2018

At least 3. 1 on the inside unit fan, 1 on the outside unit fan and 1 on the compressor. The outside unit may have both in a single chassis.

LG Electronic... | Answered on Aug 15, 2016

You have to try resetting the system. First turn the breaker off for the condenser and wait about 20 seconds. After you turn it back on the system should reset. West Palm Beach Air Conditioning

LG Electronic... | Answered on Aug 15, 2016

Still could be the fan capacitor. You cannot visually inspect a capacitor. It needs to be tested with a dvm. Beware capacitors store quite a bit of juice and although they probably won't cause permanent damage....the do hurt like hell when the discharge into you. You could try with the unit running spinning the fan manually BE CAREFUL. If it starts then the cap is probably bad. If not motor could be bad even if it spins ok.

LG Electronic... | Answered on Jul 19, 2016

remove filter and see if coil froze up. that will slow down air flow.

LG Electronic... | Answered on Aug 08, 2015

Try putting a hand on the grill while it's running to see if it dampens the noise.

LG Electronic... | Answered on Jul 15, 2015

These are quite easily damaged and sometimes just wear out. The cable from the motor can also be easily damaged. They are cheap and easy to replace. Just source a new one for that model online. When you receive it, turn off power to the system, take the front cover off, unscrew inside tray from cover box, slide tray out, remove the power box, get access to the motor and replace. Be sure to check which wires go where before removing and take photos or make accurate diagrams with color codes. Check that the control board functions normally before purchase though. A faulty board could cause this fault.

LG Electronic... | Answered on Jul 03, 2015

If it has humidity control and the cool is still on but set temp is higher than the room temp, the humidity control will override set temp. If it has no %rh control then it probably has a circuit board fault; micro relay is stuck closed and board needs to be replaced. Its probably the circuit board. On it, there is a little black box(s). About 1" X 1/2" in size. With long run times the small contacts inside will fuse/melt together.

LG Electronic... | Answered on Jun 20, 2015

You could have a stoppped up drain passage from the evap coil to the outside of the unit. OR it could be leaning too far inward not allowing the condesate to drain out. Check to make sure the unit is level, and if it is, then pull it out and clean it out. you can use a water hose, but be careful not to get the electronics wet. The passage is usually plastic or styrafoam an at the backside of the evap(inside)coil.

LG Electronic... | Answered on Jun 16, 2015

Your noise is probably your fan hitting water. First try to tilt the ac to slant to the outside. If this is done water should drain to the outside if not your drain hole is blocked from the front to the back you can see this if you remove the unit and look at the front coil housing you will see a very small weep hole clean it out and use a water hose to clean the front coil and the back coil. good luck

LG Electronic... | Answered on May 12, 2015

Lg have 5uf capacitor installed in outdoor section along with comoressor unit. It bascially helps to rotate the condenser fan.

LG Electronic... | Answered on Mar 15, 2014

Yes. If it has a port installed from factory, it can be recharged. If it used R12, it can be purchased from Ebay. It the unit does not have a recharging port, you can also purchase that from Ebay. You need to know the size of tubing the port is going on. A pressure guage would also help troubleshooting.

LG Electronic... | Answered on Jan 20, 2014

I don't think you can turn of the beep. Not without tearing it apart and removing the internal speaker, is it really that important? The temp sensor is in the unit.

LG Electronic... | Answered on Nov 20, 2013

First of all you need to check if your power supply to unit is correct (120v or 220v).

LG Electronic... | Answered on Nov 11, 2013

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