On my 1998 Ford aerostar the direction of air flow is controled by a vacuum motor, the other fords maybe the same. If vacuum is lost to the control switch the vacuum motor will not work. non activated position of motor is defrost position. On my 1998 ford aerostar I found that a vacuum line (note this vacuum line came off of a 3 connection vacuum splitter connection)that ran from engine compartment into firewall was connected inside of ac eveporator plastic cover inside passanger compartment. then the vacuum from there was routed from a plastic outlet and vacuum line, to the ac control switch. Sence I could not get to the inside of evaporator cover without much must work!! I ran a new line around the problem. to determine if this is your problem check for vacuum at little vacuum outlet at bottem of plastic evaporator cover inside passenger compartment maybe your line is just off there. Note, in surching for this problem I also found that a vacuum line that controled rear air flow was folded in half under dash preventing back ac from working properly. Blew heat all the time in back.
Do you mean the defroster fan? If so yes if it blows the main engine circuit breaker in the fuse block.
The AC is probably coming through the defroster because the air door is stuck. The door is behind the dash and is vacuum controlled. A vacuum leak or bad door will cause this problem.
A bad heater core / it needs to be replaced
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.
The motor which blows air through the vents.
One reasons a Dodge W 250 defroster may not work is the blower motor relay. This can be replaced easily. If it isn't the relay, there may be a problem in defroster door binding. A mechanic will be able to determine the cause.
what would cause all power windows to only work once in awhile and defroster to go out on a 1997 dodge intrepid
The Bands in the transmission are slipping/ the tranny is bad.
the radiotor or the cams
could be a vacuum line off
The most likely is the vacuum line used to operate the swinging doors to redirect airflow is broken or not in place.
The most likely cause of a 1992 Ford Aerostar stalling while idling is bad spark plugs. The plugs should be changed and the timing checked to resolve the problem.
you either have a blowed fuse or a wire crossed
Not unless your heater core leaks.
Area of ocean in which wind blows (fetch), Wind Velocity, and Wind duration control the size of ocean waves.
My ac blows fine through the overhead, floor and side vents but intermittentely throught the front vents. What might be the cause?
J. Gordon Whitehead but it isn't proven the blows were the cause of death and he is hardly a murderer if they were-since Houdini allowed the blows
I had the same problem and then the fan quit blowing. It was all controlled by the automatic temperature controller. If I remember correctly it was referred to as a ATC chip. I purchased the chip on line from a used parts outfit somewhere in the north for about $50.00. It is pretty easy to install. It's located on the firewall on passenger side behind a heather hose
It could be that the connector wire broke in the rear. It happened to me.
yes, because the a/c compressor in operating in the defrost mode.
Grand Marquis are designed and wired so that the VAC door fails and will even cause engine not to start due to wires be connected together under dash.
Yes, it can cause damage to it, especially with sharp blows to the head.