Because it's not a defroster button! It's just the symbol for ventilating the air into the car. It shoudln't be called a defroster since defrosting is meant by heating up the coils that you see at the back of the car. I'm pretty no car has wires in the front!
The vacuum line that goes to the defroster is probably disconnected, possibly on the fire wall.
My ac blows only in the defroster and not any of the other vents i have 98 ford windstar 3.8 v6
Do you mean the defroster fan? If so yes if it blows the main engine circuit breaker in the fuse block.
small vacuum hose in engine compartment is cracked
yes, it works just like the a/c, it just blows the air on the windsheild/windows
Could this be 2 separate problems?Stuck in defrost modeNo heatSee "Related Questions" below for more about both
Inside dashboard in path of air that blower motor blows.
It may be due to the control head needing replaced
When my a/c system is low on refrigerant, it blows hot on drivers side, cold on passenger side of the dashboard. This is a 1997 Buick Ultra. Recharging the system solves the problem.
Most likely your heater core is leaking.
Check your antifreeze or cooling level this happened to me.
This may be a cause... My wife's 95 contour had to have the vacuum temp settings control unit replace 2 times. If you are constantly changing settings it really blows the valves in the climate control center... Just a thought.