Every week or so I have to manually defrost the freezer. The freezer coils have heavy ice I defrost with hair dryer. Once I put everything back and turn on it works great. I tested the defrost heater resistance and looks good. Any suggestions?
Probable defrost time clock usually located on bottom of refrig. behind toe plate or one of the rear corners.
Pull the back motherboard cover and locate the 3 pin power connector. Remove the connector and place a wire jumper between the connector mating pins marked line and def. Plug fridg in, if you fail to get defrost action, you probably have a bad evaporator thermostat clipped to the evaporator. If defrost action, replace the motherboard AP4436216