Author Topic: LWHD1200R Window Unit. Compressor won't shut off.  (Read 11895 times)

Offline AJ

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Re: LWHD1200R Window Unit. Compressor won't shut off.
« Reply #20 on: July 18, 2009, 05:15:41 AM »
Glad to hear you got it repaired.

Thanks for the update.  O0
Hope you find our website helpful.

Offline bl8tant

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Re: LWHD1200R Window Unit. Compressor won't shut off.
« Reply #21 on: August 11, 2009, 10:59:07 AM »
The problem is back, but with a new twist !

The unit worked perfectly for several weeks.  As you saw from the above posts, the original problem was failure to shut off unless I maxed out the thermostat.  I replaced the thermistor, and it worked perfectly.  Then the past few days, it was not keeping the room at/near the set temp.  Now the compressor won't come on unless you set the thermostat at the lowest setting (and then runs continuously).

I am pretty convinced I need to replace one of the circuit boards (there are two), but I just don't know which one.  Logic tells me to replace the one that the thermistor plugs into, but it also serves as the display.  I don't usually like to throw parts at something until it's fixed, so ANY help would be appreciated.

Also, is there any way to alter the title of this post to indicate that the problem is back (might get more readers??)

Thanks.

Offline whirlpooltech

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Re: LWHD1200R Window Unit. Compressor won't shut off.
« Reply #22 on: August 11, 2009, 11:43:06 AM »
Quote
Also, is there any way to alter the title of this post to indicate that the problem is back (might get more readers??)

You could start a new topic and reference this topic related to your issue.

When it's running on low so the compressor kicks it does it seem to be cooling ok?

Offline bl8tant

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Re: LWHD1200R Window Unit. Compressor won't shut off.
« Reply #23 on: August 11, 2009, 12:54:37 PM »
AJ,

Once I get the compressor to kick on, it cools great.

I have the thermistor hanging out in the open air now (instead of next to the coils).  Once I got it out into some warmer air, the compressor will kick on at higher temps (of course).


Offline Repair-man

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Re: LWHD1200R Window Unit. Compressor won't shut off.
« Reply #24 on: August 11, 2009, 04:49:24 PM »
Don't mean to butt in, but you probably need the main PCB shown below. The display board is working ok and communicates with the main board. The cooling relays are all on the main PCB. If you order from Repairclinic you can always return the part and shoot for the other board instead if for some reason it does not work out.


« Last Edit: August 11, 2009, 04:52:06 PM by Repair-man »
"It's only expensive if someone else fixes it for you" -
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Offline bl8tant

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Re: LWHD1200R Window Unit. Compressor won't shut off.
« Reply #25 on: August 11, 2009, 06:10:09 PM »
You're not butting in at all !  I have to be honest....I was just glancing at the avatar area and realized lots of folks have "AJ".  Then I realized the actual username is in smaller gray print above it. ;D

So even though the thermistor plugs into the display board, it's the other board that would be faulty?  Do you think the new thermistor is bad now?  Or is the other board just "misreading" the thermistor output?

What really has me stumped is how the problem evolved:
1) Compressor would not shut OFF unless therm set to highest temp
2) Replace thermistor, works perfect for a few weeks
3) Compressor won't come ON unless therm set to coldest setting

I figure I'll go ahead and order the board you recommend.  I can't believe they allow returns on electronic items if it's not the problem!  That's awesome.

 

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