So I had a similar issue happen shortly after I purchased my used flash dryer.
It could be a few things - so I'll take a guess. Your dryer is made up of 3 parts really: Hesting element - Ceramic Terminals - Single Pole Breaker.
If your dryer is turning on, your breaker is ok. The next part would be your terminals which basically take the power from the breaker and run into your heating element (coil). Check that the wires are screwed in properly and that your terminals aren't cracked or broken.
I shouldn't have to say this but make sure your device is UNPLUGGED lol. Don't want ya to get fried!