My LG refrigerator is not operating and has an error code rF displayed on the front panel. Ausurion has come out several times and replaced the evaporator fan motor, the compressor and several other major components and this error condition continues to persist. I’ve unplugged and replugged the refrigerator and the error condition persists and the unit does not operate. This has been going on for 4 weeks. Can you provide any further insight as go what is causing this problem? Pls advise. Thank you for your time.