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Your 1999 astro van how do you get the dash board vents to open it stays in the defrost mode how do you fix this?
Wiki User
∙ 17y ago
defrost is the default mode. in most cases a vacuun leak is the culprit.
Wiki User
∙ 17y ago
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Your 2001 Chevy astro van blows air by the defrost vents only any ideas?
You lost the vacuume supply coming from the engine, defrost is the default mode if a mafunction in the vacuume supply is lost.
Selector only stays on defrosted 92 buick?
If the heat selector will not switch from defrost to the dash or foot vents on a 1992 Buick, it is possible that the cable connected to the vent is broken. When the selector is moved from defrost, a cable opens the other selected vents on the heater.
Where is the air condition duct for the vents on a 1994 Astro van as air only comes out the defrost?
Sounds like a vacuum problem - leak either under hood or under dash -- could ba a bad vacuum motor under dash Defrost is the default position for this system
Why is there no air coming out of vents can hear air blowing under dash board?
The year, make and model would help but many vehicles use vacuum to operate the direction of air flow through the floor vents, dash vents and defrost vents. If the vacuum supply is cut off for whatever reason the system defaults to defrost only. So if you only have the defrost mode working chances are the vacuum supply is cut off. Check the HVAC vacuum supply line under the hood for damage. If that system seems to be working but you have insufficient air flow through all of the vents, check/replace the cabin filter if applicable.
99 astro van will not blow air out of the vents when switched to dash vent only blows in defrost and floor?
google astrosafari van repair and you will find a lot of info on how to repair/replace your vacuum lines and valves
Ac stuck on defrost 1999 Isuzu Rodeo. Cant get it off of the defrost setting. Need air to come through the center vents?
Your rodeo has 3 actuators. One is for your evaporator(cool air) another for your heater and the other one controls your defrost , face and lower vents. These electrical actuators are about the size of a donut and have a hole in the middle with a bushing which engages with your vents, located under your dash board on the passenger side.It may take alot of unscrewing and alot of patience, but its the only way to solve your problem.
I have a 2004 Ford Mustang and you will just be riding along and my air conditioner will just randomly start blowing air out of my defrost vents What is going on here?
You have a vacuum leak causing your vents to switch from dash to defrost.
The air conditioning unit is blowing only through the window defrost vents of 1998 Chevy astro van?
Check the vaccuum hoses going to your manifold- The one that controls air flow direction to your AC is probably split Astroman
Why won't the dash vents work on my 1995 Chevy Camaro but floor vents and defrost vent work fine?
When there is a problem with the vent system it dfaults to the defrost setting. Sounds like you have a problem in the doors that direct the air flow.
Why does Air conditioner work on defrost only and no front vents or floor?
Vacuum leak
Why heat blows out vents only not defrost or floor?
Most likely a bad or disconnected vacuum hose to the defrost/floor selector in the heater ducting.
What causes the front air conditioner on 1999 Lincoln navigator to stop blowing through the ac vents and start blowing through the defrost vents?
When there is a problem in the vent system it defaults to defrost setting. Check the doors & vac supply
