Meant as a backup to a high limit thermostat, this fuse is typically set to trip at a higher temperature than that of a high limit thermostat. This is a one-time use fuse, so when it does trip, you do...
The first thing I did was to unplug the dryer from the wall. Then I removed the bottom two screws and slid the bottom cover off so i could see all the way to the back, I tipped the dryer back against the wall and searched for the problem with a flashlight. I noticed that one of the guide wheels that held the drum in place was sheared off. I took the new drum support roller out and carefully slid it over the shaft, I had to jiggle it around for a bit, but then it finally was seated correctly. I replaced the washer and then the clip using a pair of needle nose pliers and a regular screw driver and then turned the dryer by hand to see if the wheel came off. After confirming that it worked, I put the cover back on, and plugged it in and tested it.
Wasn't the belt!! Changed it anyway. Should have come here earlier. That mistake added several days to the repair waiting for a second batch of the right parts. Became a pro at taking the dryer apart and reassembling, though! Easy job, just take your time and mark your wires, if you need to. Followed other people's excellent instructions. Clean out all the dust bunnies. Schematics were a great resource. Those and the prices made me a repeat customer. The shaft of the Idler Lever wheel was the cause, but decided, since I had it apart, to spend a little more money and replace both Drum Support Rollers and the Roller Bracket and Shaft Assembly. They showed some wear, and the parts were very inexpensive. Make sure you have snap ring pliers with prongs that are smaller than the standard 0.40 to save some aggravation with the Drum Rollers. $5 tool. Total parts were less than $60. Probably saved $150+ in labor. Quieter than ever now. Thanks!
Remove front panel, lint basket, motor mounts,exhaust hood, front drum brackets. Then slip serpentine belt around drum, pressure w/ tension idler pulley and slip around drive motor spindle. Replace all parts in reverse order (a two person job). Vacuumed inside of dryer (full of lint.)