My dryer was spinning and blowing but the air was not getting hot. I searched the symptoms on youtube and appliance parts pros video came up listing possible reasons for the failure and how to test for each. I was able to determine the thermal fuse went bad with a simple multi-meter. Just to be sure, I tested all other components as recommended by the APP video and they all checked good. I placed the order, and had the parts I needed in 2 days! Had to say I loved the "how to install" videos listed on the APP website. I wouldn't have been able to pull off this repair without them!