If you dryer is a Whirlpool/Kenmore, the culprit is this little boogar, the Even Heat Control Board. It’s located in your dryer’s control console, you’ll have to open it up to get to it. This parts breakdown of the control console will help you–it’s item 13.
GE/Hotpoint dryers have a belt break switch that stops the dryer if the belt is broken. The drum will turn while the start button is pressed but the motor will not stay on. In this case, the cure is pretty painless: replace the belt. If your belt isn’t broken, then check the continuity of the belt break switch, located beside the motor. If the belt and the belt break switch are both good, then the motor is bad and you’ll need to replace it–come git you a new one. Whether replacing the motor or the belt, it’s worth spending a few shekels for a GE/Hotpoint dryer repair manual. Or, better yet, ask the Samurai in live help.
Awwite, go fix your dryer.
To learn more about your dryer, or to order parts, click here.