Recently went to an appliance store and bought a Bosch 500 Series dryer. It heats up, for about 30 minutes, then its blowing nothing but cold air. I hit the fuse reset button, then it goes for another 20-30 minutes...then start blowing cold again. I have to keep hitting the reset button...why cant it just keep heating on it's own? Please someone help me I do not want to hit that button every 30 mins!! Thank you!