I have a fairly new home (3yrs old) and it has two heating-a/c units. When I turn my heat on upstairs, I can feel cool air blowing out of the vents, however downstairs... I can feel heat when placing my hand close to the vent, but it does not blow out. Help!! :confused:

Would help if we knew what kind of equipment you had, gas,electric,oil, furnace, forced air,heat pump, also name brand,, also have you checked the breakers? So many questions need many amswers