HEATER/AIR BLOWER CAUGHT ON FIRE. THERE WAS NOT AN OBSTRUCTION CAUSING THE FAN/BLOWER TO OVER HEAT. I CAUGHT IT SOON AFTER THE FIRE STARTED SO WAS ABLE TO PUT IT OUT BEFORE THE ENTIRE VEHICLE WAS ON FIRE. THE VEHICLE WAS STATIONARY IN MY FRONT DRIVEWAY AND HAD JUST STARTED IT RUNNING TO WARM UP.