Christophe P Scottsdale , AZ April 26, 2020 Appliance: Model LG MODEL LRBM20512WW No cool. Fan runs, compressor does not run. I originally ordered a master board to replace. I did that with no positive results. I ordered a compressor start relay and they overload protector. I did not do any diagnostics on them. I was willing to spend the small price on ordering them and installing them to see if it would solve the problem. I replace both at once just in case one was stressed because the other one failed?. Once everything was installed plug refrigerator back in and compressor activated The refrigerator cooled . Repair complete . 6 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes