so far everyone points to actuator blender failure but check for vacuum leaks first
either you have a vacume leak under hood or the diaphragm is blown on vent selector
Because the air selector died.
Directly on top of the transmission. It has the shiny post going through the center of it and 1 electrical connection. Easily accessible
you probley have a vacume leak due to a broke or craked hose u should take it to a shop for a pressure test if u do not have a vacume tester.
Does air come out at defrost vents? Defrost is the default position. Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum actuated motors under the dash Check the operation of the selector switch
When there is a problem in the vent system it defaults to defrost setting. Check the doors & vac supply
The way you get the Windstar through Marta is to plan ahead. Know the route that you want you to take, and try to travel during the day when traffic is not bumper to bumper.
You have vacuum line leaks somewhere.
This "flap" is the temperature blend door which directs air over & through the heater core.The "Related Questions" below are intended to help explain some of the basics of Windstar heating/cooling functions and terminology.That should help in the investigation of the specific problem on the vehicle, and ultimately leading to a fix.Start with the "Where is the heater control valve located on a Ford Windstar" question and then move on to the "What could cause a Windstar to have no heat - or not be able to adjust the temperature"
In many cases leaves can cause smoke to blow through the defrost of a 1990 Ford F 150
Could be a vacuum problem--either broken or disconnected hose or bad vacuum motor under dash or coming in through firewall Defrost is the default position for this system
Check for vacuum leak either under hood or under dash Check for bad vacuum actuator under dash Check for bad selector switch in dash