Defrost Heater with Harness and Thermostat WR51X10029

I had to back-track acouple of times because I put the shelf brackets back in before I had the back panel in.It was also alittle tight getting the thermostat snapped back on the refrigerant line because it is a tight space and I have big hands.For a first timer who has had minimal experiance it wasn't too tough.

I removed the back panel of the freezer to troubleshoot and found the coils to be completely frosted over and the bottom of the freezer was a block of ice. The cold air was not allowed to circulate over to the refrigerator side. I put a meter on the defrost heater at the bottom (basically it's a wire filaments encased in a glass tube) and there was no continuity which meant it was bad. I also took the defrost sensor (small round sensor at the top above the coils) and put it in a working freezer then after awhile I took it out and put a meter on it until it warmed it up and it clicked so I knew that worked. The defrost sensor should show continuity (closed circuit) when cold and no continuity (open circuit) when warm.
So at this point I knew the problem was the defrost heater due to no continuity. I purchased the defrost heater assembly which also came with a new sensor. Unplug the old and plug in the new. Super simple. The defrost cycle works as it should and now the refrigerator works perfect.