The refrigerator section of my side by side was not getting as cold as it should have been.

It was easy after finding PartSelect online. It wasn't obvious at first that my evaporator core(in back of freezer side) was frosting over, (since I have a flat white panel that is about 8 x 30 inches covering it), until I reached inside and ran my fingers over the cover and noticed a thin layer of frost on it. At this point I told my buddies to go get ice for our beer cuz I was fixin to do a lock out/tag out on the Fridge. Seriously, Do disconnect the electrical power before taking it apart. After taking the 9 screws (6-1/4" hex heads & 3-#2 phillips)out and removing the panel, I saw that the evaporator core was completely frosted over. I then put a large towel in the bottom and let it thaw for a day. Next day after getting the old Defrost Heater Kit with Thermostat out (4-#2 phillips, plug-in electrical connection, thermostat snap on clip) , I noticed it was burnt inside the filaments and did not pass the continuity test. I then ordered my part from PartSelect and took the oppurtunity to clean my fridge spotless. 3 business days later, I received my part, installed it, and now have a "like new" refrigertor. Actual repair time - 30 minutes, Overall down time - 4 days, Saving the cost of a new Fridge - a heck of lot more beer!