Hello, I have a GE Prolife side by side refrigerator PSF26PGSA BB and I notice that the refrigerator side has ice build up on the back wall of it in the inside. Can you please help, could it be the temperature sensors or could it be the Defrost Heater & Bracket Assembly? Because I do not see any defrost heater sensor where the coils are inside of the refrigerator when the cover is removed.

SOURCE: Hello, I have a GE Prolife side by side

Where exactly on the back wall of the fresh food compartment(refrigerator) is this ice build up? If its building up in the air vents, that usually indicates a warm air leak, and this additional warm air is creating condensation, read ice, where it meets the colder air. There is no defrost heater or sensor in the refrigerator, all the cooling components that need to be inside the cabinet are located in the freezer. To check for warm air leaks, check to see that your light switch turns the light(s) off, check that the door actuates the switch when its closed, you will have to close door and squeeze part of the gasket to see if the light stays on. Furthermore, check the door gasket itself, make sure there are no gaps, rips or other malformations. Check that the bottom part of the gasket is not sagging, or the hinge side corners are not bunched up, or stretched out from the corners. Also, let the door close by itself like normal, and check the lower portion of the non hinge side of the gasket, if there is a gap here, further check for scratches on the bottom inside liner, not the door, inside the bottom of the fresh food compartment. If there are scratches here, this indicates the door is rubbing on the bottom because its too low, indicating a problem in the lower door hinge area. You dont mention any refrigerator freezer temperature problems, so it does not sound like a defrost problem or an issue with an evaporator fan motor failure.