If it's shutting down on the heating side,
you A: have a faulty breaker
B: have a problem in the heating function.
C: have a short in the wire to the heating element.
UNPLUG, then check the wire to the element for
chafed insulation, burnt spade fitting, etc.
Don't R&R this with automotive or house wire.
Buy a length of armored woven wire for dryers
Also, shouldn't your dryer shut down totally when it pops a breaker?
Jim in Quincy MA, July 2006