Customer Questions and Answers for Refrigerator Defrost Control Assembly by Lg

Frankie, The first step in figuring this unit out would be to remove the rear wall and check to make sure that there is a frost pattern on the evaporator coils. The fan does not run when the doors are open. If there is ice completely covering and blocking air flow then this would be a defrost issue in which you would need to test the evaporator sensor, defrost heater and if they are ok then will be a faulty control board. If there is no frost pattern at all then this would be a sealed system issue in which you would need to have service to repair. If the frost pattern is full even frost pattern top to bottom then this would be a normal frost pattern and would need to test to see if the control board is sending power to the fan to run. If it is then replace the fan if it does not run.