Furnace Blower does not shut off
The furnace under the couch is acting strange. I turn on the furnace at the thermostat, the furnace fan runs until it is fully vented, the burner kicks in and the furnace runs until preset thermostat temp is reached. The burner then cuts out but the blower never stops--I mean never!! I realize the blower should run until the furnace cools down (like the rear furnace) but it doesn't. Any ideas as to how to remedy this situation?