vent is the only source of heat on 1999 Ford Taurus

okay this is what's up. when i drive the car and have the vent on that's the only way of getting heat.we cheaked the fuses and they are okay. I need to know what it could be, can it be fixed for how much and is it really worth all the time in effort to get it fixed

1 answer
it may be a vacium hose on the switch. if one is broke it wont let it switch. if thats it just get some rubber hose and slide over it so it is a tight fit and it should work again thats what happened to my truck