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What causes the front air conditioner on 1999 Lincoln navigator to stop blowing through the ac vents and start blowing through the defrost vents?
Wiki User
∙ 15y ago
When there is a problem in the vent system it defaults to defrost setting. Check the doors & vac supply
Wiki User
∙ 15y ago
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Your central air conditioner turns on but is not blowing through the vents?
If central air conditioner turns on but is not blowing through the vents, check the filter. If it is dirty, change it. Change the thermostat into cool, this will defrost the air conditioner.
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.
What causes the air conditioner on a 2003 Chevy trailblazer to stop blowing through the ac vents and start blowing through floor and defrost vents?
Check for a vacuum leak -sounds like it is starving for vacuum and reverts to the default position
AC fan is blowing cold air out of windshield defrost when not on defrost?
does fan door motorized or on a vaccuum line when you switch from AC to defrost?
Why is your air conditioner only coming out of the defrost in the car?
It have battery
Where is rear defrost switch on 1998 navigator?
On the dash below the headlight switch
My defrost fan is blowing but will not defrost my windows?
That means either you have air in your heater core or your heater core is being bypassed
Why does Air conditioner work on defrost only and no front vents or floor?
Vacuum leak
Why ac blowing out defrost vent only dodge 1998 ram 1500?
The AC on a 1998 Dodge Ram 1998 will only be blowing out the defrost vent if the air handler is not set properly. This can result from a piece of debris getting stuck or a faulty flap.
What are the buttons in a car called that turn on air conditioner and defrost etc called?
buttons buttons buttons
How come ford heat and ac changes from blowing through the panel to blowing through the defrost how do i trouble the vac system?
you have a vac. leake or the oneway check valve is not working.....
1989 Chevy Corsica has no heat or defrost or blowing at all why?
If you feel no air blowing at all (when you are not moving) then your fan is not blowing. If it is blowing air, and it is cold, when the heater is on, then most probably your heater core is leaking, or is clogged. These are easily replaceable and go bad all the time in older cars.
