I recently inherited a 10 year old LG LFX28978ST with the linear compressor. It stopped cooling completely and he bought a new one. I quickly learned about the bad linear compressors but this unit was too old to be part of the class action suit and it's not listed with the 64 models that were effected. I ordered a replacement linear compressor for it because after all the original lasted 10 years. I ordered it on line from Appliance Parts 365. The unit model was FC75LBNA which I think is not made anymore and they sent me a FC75LANE. I hired someone to install it. That was 5 days ago. The refrigerator is maintaining it's set point but the freezer won't go below 25F. It has been set to 0F and now minus 6F and no change. The compressor has run constantly since I plugged it in. I am having the guy back out to at least check his Freon fill to see if it was correct. There are no error codes anything else I should have him check? I cleaned the condenser coils which weren't very dirty.
P.S. I think I can upgrade to the updated non-linear compressor but I would need to replace the control PCB and it's confusing because my PCP is one unit while the new ones seem to be segmented into 2 units. I also don't think I want to invest another $1000 into it as I'm already $650 in.