Replaced defrost sensor in freezer compartment, if you are handy this is a do it yourself job. The cover in the freezer section just pops out not tools needed. You will need a few small zip ties and some cutters to remove the old zip ties. Take a picture were the old sensor was before removing and reinstall in the same place. I used a meter to check continuity of the defrost element and found the element to be ok. I was quoted $85 to have someone come to the house just to check the unit and then the parts would be extra. This part cost approx. $12 and a few dollars for shipping.