How to Find a Model Number
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,
Quote from: pmoph71 on June 13, 2021, 04:04:01 PMHey 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.
AlhelpzerThe compressor is probably running but the reed valve inside broke so it is not compressing the gas anymore.The smaller diameter tube coming out of the discharge of the compressor going to the condenser coil should be like 20 deg hotter than the room temp. So if its 75 deg F ambient in your kitchen the condenser should be around 95 deg give or take but definitely hotter than the room otherwise it is not pumping compressing the gas.Or all the gas leaked out but most likely the valve broke in the linear compressor.Neither of those possible issues would set any error codes on front of fridge display and would not flash any error on the main board either.
The new version compressor seems to be lasting much longer they redesigned it and have new software update for the mainboard.You might get more life out of it once they do the updates.There were some older models that had leaks in the evaporator which sucks air into the tubing after all the gas is leaked out.The oil in the system gels up when moisture mixes with it clogging up the tiny tubing so those machines are shot even if you replace the compressor because you cant clean all the gel sludge out of the tubing.
The FLS075LANA is the newest version "universal" LG compressor that replaces several older model compressors, hence the nickname Universal.It does require software/firmware update on the mainboard otherwise the new compressor can be damaged according to LG.There may be an exception to software update only if the fridge has a separate inverter board control box down next to the compressor. That style fridge is older like 2010 era so I don't think your fridge is that old and you probably have one big board on the back with the inverter built into the main board. That type board needs to be flashed with new firmware.Here is a LG training video that explains the process.https://youtu.be/Z5oMBH3CSK0
...My board has an orange sticker that says FC75LBNA NTC on it.
Quote from: quada on April 09, 2021, 08:42:57 PM...My board has an orange sticker that says FC75LBNA NTC on it.quada, do you mind sharing your progress with this? I have the same model. From what I'm getting, the separate inverter board cannot be flashed with new software, and it's also hard to replace it as this model comes with 2 (main and inverter) PCB boards, which they later changed to 1 single in later models, but I haven't read a single success story of replacing the 2 boards with newer composite 1, so FLS075LANA isn't an option (unless LG aren't honest about it going out prematurely with non-updated inverter boards), therefore one should find an outdated hard to find now older yet still functional FC75LBNA to replace the faulty one.
Was there ever an answer here on this one? I have the exact same boards and issue.
Quote from: garzaglass on July 23, 2022, 02:13:57 PMWas there ever an answer here on this one? I have the exact same boards and issue. No. From the best of my understanding collected both here and other forums, these 2 PCBs aren't upgradeable. Your choice is to replace the compressor with a stockpiled one of the same model (bc 10 years life isn't too bad TBH) or junk the whole fridge (which I did).On the other hand, if you are into experimenting, you can replace it with LANA and see what happens. What if LG lie? I wouldn't be surprised TBH, because telling truth in this case may not be deemed in their best financial interest.
Thanks for your reply. Unfortunately I jumped the gun and purchased the new LANA with the upgrade module thinking I could do this but realized I couldn't when reading this thread. Luckily I have NOT installed the new compressor so I should be able to return these items. I'm thinking the best option is to buy a new fridge.