Thank you for the help on a manual. I am trying to learn about LG refrigerators also. I talked to another local servicer that is authorized LG this afternoon and he suggested the Bi-metal resistor/thermistor could be the problem.
Will give the history of what I know. I had a customer call convinced he needed a control board for his refrigerator. I ordered a control board went out checked out refrigerator. I found the evaporator fan motor to be bad. Refrigerator would come on then a minute or two later the numbers 6,7 would start blinking on freezer control. I ordered and replaced evaporator fan motor. Powered up refrigerator and it worked fine according to the customer from Friday of last week until last night. 6,7 started flashing on freezer control and refrigerator stopped working. I hope this gives you better insight into the problem I am running into.
I have a LG refrigerator M# LBN22515ST that is flashing 6,7 on freezer control. I replace evap fan motor as it was bad. Refrig stopped bling 6,7 and worked for a few days now it is back to not working. Looking for suggestions on what I should look for next.