If your dryer seems dead when you try to turn it on when you press the start button and nothing happens, chances are the door switch is bad, or your Thermal Fuse is blown Out. Dryer Door Switches wear out from normal use, but repeatedly slamming the door can quickly break it as well. Children are the best at breaking them.
Visually Inspect Dryer Door Switch
Start by checking the plunger, try pushing it and if it doesn’t make an audible clicking sound it’s defiantly no good. Located underneath the door when it closes, the locations change so you’ll have to locate it by opening the door and looking for it.
If it’s missing or broken, replace it. If the plunger checks out, the next step of your dryer troubleshooting is to check the thermal fuse, which is mounted on the blower housing, which is located in the back of the dryer.
Test the clothes dryer door switch.
Remove the rear service panel. If you don’t get a continuity reading from the thermal fuse, DO NOT simply replace it.
A Blown Thermal Fuse is a Warning
You have other serious problems—either a malfunctioning thermostat or a clogged vent.
Most likely a build-up of lint caused it to blow, remove the lint before just replacing the thermal fuse.
If the build-up is not removed then you may have a dryer fire.