dryer wasnt heating up, though it would run

Removed the dryer's back panel and took a look. Had no idea what to do next, so I read up on it. Partselect was extremely helpful to me, the exploded views with the part numbers called out were particularly helpful. So I determined it was the thermal fuse. Unscrewed the screw holding in the fuse and disconnected the electrical supply. New fuse went in really easily. Job took a lot longer than it had to cause since I was in there, I cleaned out the dryer really good.

Why the fuse blew was interesting: had an extension cord routed over the dryer, well it was situated such that it caused the timer knob to bind up. Apparently, the dryer ran all night because of this and blew the fuse. So don't obstruct the knob or you will be replacing a thermal fuse!