My dryer starts up and shuts down a minite later; is it the motor?

I've just stripped down a Simpson dryer and discovered that the fan belt at back of the machine had come off.I believe that the thermostat has been tripping out repeatedly as the machine was overheating very quickly due to that fan not running.(I don't know this to be true but is my best guess?!).
The machine is now not running at all and I believe the thermostat has now been ruined due to the fact I did not recognise that the tumbler was still tumbling but the fan was'nt blowing at the same time.

Gordon
July 2006