Product review (5 stars): Beats replacing the refrigerator!
After having to manually defrost my fridge, I was reluctant to call for service. After the first time defrosting with a hair dryer, the fridge worked for about 5 days then the refrigerator side was getting noticeably warmer again. The second time I took it apart to defrost the coils and actually take a better look, it was apparent that this heater was burned out - black on the inside like a halogen bulb. The installation couldn't be simpler, taking out all the frozen food takes longer than changing this part.

  This pertains to a GE side-by-side.
1) Remove the food, drawer and wire shelves
2) Remove the light bulb cover
3) Remove 2 (I think) screws that hold on the back panel covering the evaporator coils
4) Un-clip the ground wire from the panel and finagle out the panel
  At the bottom of the coils is where you will see this defrost heater installed.
5) Remove 2 screws
6) Unplug wire spade connectors
7) Install new defrost heater in reverse order

DO NOT TOUCH THE HEATING ELEMENT!