You push the start button--and nothing happens. First, make sure the door is shut tight. If the dryer still doesn't start, there are several possible reasons, from a door switch that's not recognizing that the door is closed to a failure in the main electronic control board. A broken power cord, failed push-to-start switch or a bad timer can also prevent the dryer from starting. Some dryers use a motor relay to control the drive motor, so a broken motor relay can prevent the dryer from starting.
If you hear the motor running but the drum doesn't turn, you likely need to replace the drive belt. Some dryers use a belt switch to keep the drive motor from running so you might not hear the motor run when the drive belt breaks. A failed drive motor will also prevent the dryer from starting.
In electric dryers, a blown thermal fuse can keep the dryer from starting. Follow the tips in this electric dryer won't start troubleshooting video to figure out the problem.
Although a blown thermal fuse won't prevent most gas dryers from starting, all of the other failures mentioned above will prevent the motor from running. Watch our gas dryer won't start troubleshooting video for tips to get your gas dryer going again.