FIXED LW1816HR Window AC/Heater Won't Power Off

JimInFL

Premium Member
Joined
Jan 16, 2019
Messages
15
Location
FL
Model
LW1816HR
Brand
LG
Age
1-5 years
We have an LG Model # LW1816HR window AC/Heater in our little (1000 sg ft) Florida house, that we use for a heat source on cool winter nights. We are in our FL house only during the Winter. We have also been using the Energy Saving setting during the summer, with the thermostat set on 80, to keep humidity out of the house.

We purchased it in March, 2016, and have used it the last two Winters.

The unit has the following settings: Cool, Energy Saver Cool, Fan, & Heat, and it has a timer (set from 1 to 24 hours to power off or power on).

This year, the unit will not power off. You can power off the heat and cool settings, but the blower will not power off, even when the power button is off, and the display is dark.

The only way to get the blower to stop running is to push the current interrupter on the plug.

We have exhausted LG and Home Depot for a possible fix.

TIA for any help.
 

Jake

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Hi Jim,

Its the relay on the control board that's gone bad, you'll need to order and replace the control board.

Here's the control board for your model: Main Control Board EBR76261810

Jake
 

Jake

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Yes, if you've fixed other things around your house this shouldn't be a problem.

This video gives you the general idea of how to do it below, you shouldn't need to remove it from the window though. Its located behind the control touchpad, make sure you unplug it from the wall first.:)

[video=youtube_share;4tJCs5ytois]https://youtu.be/4tJCs5ytois[/video]

Jake
 

JimInFL

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Messages
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Location
FL
I saw where it's located Right behind the control panel.

If I look at the board that's in the AC now, will it have a part #?
 

JimInFL

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Location
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OK, I'm gonna order it.

I think I'll take a look at it on our AC today, just to be sure, although I am close to sure now.
 
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JimInFL

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Location
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Two things:

1. I talked to that supplier, it is the right board, and they do have it.

2. I tried to get to the main board on our AC, and cannot, because the display does not want to come off. I've got the screws out, can slide it up above the two tabs at the top to where it is loose, but it seems to be hung up at the top. The direction fins appear to be involved. Am I right that the main board is behind the display, so I need to get that off.

I will wait to order, and do some cleaning in the mean time.

Thanks again for you help.
 

JimInFL

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Location
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OK, I got the display off, and can see the main board.

But, how do I get the board out and the new one in?
 

JimInFL

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Location
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I'm waiting to see how to get the old board out and new one in before I order it.
 

Jake

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The board should unscrew out, look for screws holding the board in place.

Jake
 

JimInFL

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Yeah, I don't know how to get to the screws. Can I email you a picture of how the board sits in there?

Here's my guess:

Remove the capacitor, and then there's room to get to the board, which is fastened with just one screw at the back.

I'm waiting to do that.
 

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Jake

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I need to see a wider photo view.

Jake
 

Jake

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Take that screw off that's in the right bottom side of your photo, and that casing should pull out.

Jake
 

JimInFL

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Take that screw off that's in the right bottom side of your photo, and that casing should pull out.

Jake
I did that and it would not budge.

I believe there is another screw on the back upper left of that casing.

I believe the direction fins are also attached to it.

None of that would be enough to prevent me from pulling the casing out . . . just saying, to be sure.

However:

1. There is a screw on the lower right side holding the casing that cannot be gotten to without sliding the whole tray out, and

2. Even if the casing was out, if it is enclosed on all sides, I still can't get to the board. I only could if the back is open.

It's not that I don't want to replace the board; it's that I don't want to order a new one if I can't get to the old one.

&, I'm in no hurry to do it wrong.

Thanks for your help, and I'm beginning to see why LG did not want to do it.
 

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JimInFL

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Disregard most of the last post.

That casing is moving freely, and it appears that if I can get it past whatever it is holding up on, I can get to the screw on the lower left, which appears to be holding the right side of the casing to the casing. If I can open that side of the casing, I can get to the board.

I'm getting closer.
 
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Jake

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Excellent Jim, Perseverance pays off.:)

Jake
 

JimInFL

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Location
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The casing was hung up on the upper right side. I was able to persuade it with a screwdriver, and it is sliding out.

So, I ordered the board.

Hopefully, in about a week I will be posting that the unit is working right.

Thanks again.
 

Jake

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Sounds good Jim, yes let us know.:)

Jake
 

JimInFL

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Messages
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Location
FL
It's done. Working good.

Man, I don't envy you guys . . . that stuff's tough to do.

Old board pictured.

Thanks a bunch. . . that save a $650 AC.
 

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