If you have a ohm meter, check the thermal fuse first. It is located at the top of the heater housing and has 2 wires coming to it. It could also be the element, it could also be a breaker problem, If you have a old house with fuse type breakers 1 out n=of the 2 fuses that your dryer takes to run could be bad.
Good luck Tom T. PAONE's APPLIANCE SALES & SERVICE GUIDE