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Why does air blow through vents on the dash but not through the defrost vents on top when you switch the control?
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What is a mode switch on an Acura 3.0 cl?
Mode switch is for the climate control. It allows you to direct the airflow from your feet, to the dash vents, defrost etc.
In your 1997 mustang the air is blowing through the defrost Why isn't it blowing through vents?
this one is easy your switch the controls the vents is not working there is a flap the closes the defrost vents so that it goes through the other vents or there is a vacumn line that is controlled by the switch, and its leaking. The vacumn line is usually on the engine side of the firewall. It is a very small plastic tube comming out of the middle of the firewall at the top and it connects to a junction with other vacumn lines. See if any of them are disconnected.
What is wrong with 03 trailblazer climate control won't switch from feet to head vents?
If the climate control on a 2003 Trailblazer will not switch from feet to head vents, try changing it to defroster then back to head. The mode button on the dual climate control model can only be switched from face/feet to feet and then to defrost. The feet and head vents worked at the same time.
Why does a 2003 Crown Vic with auto temp control blow heat and ac from the defrost and floor vents but no air through the dash vents?
Because the air selector died.
Why won't air come through the vents?
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
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.
Why do you not have air flow from the dash vents on a 2002 Mercury Sable when the defrost and floor vents work fine?
Your most likely issue is a bad hvac control switch. On older cars, this was operated by vacumm pressure, but on a 2002, it is all electrical. It may be that you need to replace the whole control unit.
Vents will not change on e-150 ford vanBlows out defrost only.?
The e-150 heat/ac system uses vacuum to control the air direction through a series of doors. There is most likely a vacuum leak causing the defrost door to keep air flowing away from the dash vents.
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
1990 Nissan 300zx What if the AC works but will not change from the dash vents to the floor vents or defrost wents you I have replaced the climate control switch?
ITS THE VACCUM ADVANCE WHEN YOU ACCELERATE THE VACCUM IS LEAKING WHEN YOU RESUME SPEED THE A/C REACTS NORMAL CHECK VACCUM HOSE LEAKS
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.
AC vents blowing through Defrost and bottom vents 05 crown vic?
2003 crown vic air conditioning vent dont blow
