It most likely is the thermostat which is in back it unplugs and replace. you can check with ohm meter. the other thing is the heating element which is the thick wire looking thing on the bottom it lifts up and unplugs to replace. You can check with ohm meter check resentence if nether is bad it has to be the switch on top the thing you turn to make everything go on or off easy unplug unfashion and replace. [ if no resistance on element or thermostat that is the problem then you know which one to replace ]