Hey Houptee, I'm ready to throw in the towel on this if the new compressor could have been damaged. Are the odds good that doing the software update on the new board will fix the problem? If not, it's the scrap heap for the LG. thanks,
If compressor is running it might be leak in sealed system or under or overcharged. How did you evacuate and weigh in the charge? It only needs the amount of 134a shown on the decal inside the fridge. Do you have guages hooked up to high and low side? When off the pressures should equalize at approximately 40psi and when running low side is very low almost 0 sometimes and around 100 high side. Pressure depends on the ambient temperature of the room but that is ballpark what to look for.
Many techs blow out the condenser with nitrogen and find black sludge comes out so some say they just automatically put in nrw condenser if doing compressor on LG to avoid call back.
It sounds like you have a LOT of experience with this dreaded LG compressor situation so I'm hoping you can share some tips.
My LG fridge falls into the list of models that were a part of the class action lawsuit for bad compressors. The fridge is about 4 years old and it has stopped cooling on both sides of the fridge/freezer. Everything seems to check out and be functioning, no codes, etc. I found the service manual so I may do some additional tests but some of this stuff is beyond my experience.
LG FLB075LANA Linear Compressor.
The only real symptom beyond not cooling is the sound of the fridge running sounds a bit different than before. If I open the fridge side, I can hear the compressor and it sounds just slightly different than it did before.
All fans seem to work as they should. No issues with evaporator were present. Coil was clean overall. Fan on coil/compressor is running fine. I can hear both fans on fridge and freezer side engaging as they should.
Is it worth doing this test to see if the compressor is getting enough voltage? https://www.youtube.com/watch?v=SXGEY8XDA4o
Considering there is a class action lawsuit for this compressor specifically, my guess is its the compressor itself.
I've changed out PCB boards on other fridges, changed out parts on my natural gas stove, natural gas dryer, multiple washers, etc. So I'm not new to appliance repair, but its not what I do regularly so I'm pretty much back to square one with each new problem that arises.
Anything else to check or test? I have a repair guy scheduled from LG but it sounds like they may not make it here for a while so I may be stuck without a fridge for a week or more so I want to be proactive and see if there is anything else I can test/check?