We have a 1500 sq. ft. home with cathedral ceilings in the main room and recessed ceilings in the bedrooms. The main rooms and the master bedroom stay cool with the thermostat set at 76-78 but the two remaining bedrooms are hot. We live in Alabama and the outside temp ranges between 85-100 degrees in the summer. Both bedrooms have ceiling fans. How can I determine the problem in the bedrooms?