If your Kenmore dryer isn't working or is running without heat, you may have a blown fuse. If you are familiar with the basics of appliance repair, replacing the thermal fuse on a Kenmore dryer is fairly easy to do. The most difficult part of the task is moving the dryer to access the fuse. Replacing the fuse on a Kenmore dryer will be much more cost effective than having a repair person do the job for you.
Purchase a new thermal fuse. Have the model number of your Kenmore dryer for reference when you purchase it to make sure you find the right fuse.
Unplug the dryer and pull it away from the wall far enough so that you can reach it easily. Remove the vent tubing from the dryer. If your washer and dryer are stacked, then you will need to unstack them.
Remove the back panel by unscrewing the screws holding it to the dryer. If you can't remove the back panel by removing the screws, then you may need to remove the top. If the lint filter is on the top, lift the cover and remove the screws holding it on. Then use a putty knife to unlatch the top clips. Once this part is disassembled, you should be able to remove the back panel.
Find the thermal fuse. It is a small white plastic or metal bar with two wires running into it near where the vent hose is inserted. Mark the wires so you will remember which goes on the left and which goes on the right. Unhook the wires. Use your wrench to remove the bolt holding it in place, and set the bolt aside.
Install your new fuse. Replace the bolt and the wires. Reassemble your dryer.