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When the ac is running the air only blows from the defrost location?
Wiki User
∙ 16y ago
something is wrong with the mode selector system. (floor, dash, defrost, mix). depending on the year of your car either the switch, vacuum line, cable, or electric motor, or wiring, or the door itself inside your dash. it's on defraust because the car makers made it that way so if this failed in the winter, you'd be able to see. take some panels out of the way on both sides of your car under the dash, you may be able to see what is wrong.
Wiki User
∙ 16y ago
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Why would your heat only work on defrost?
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
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.
Why doesn't heat blow out floor only?
the heat blows out the defrost when it should blow out floor vents only
Why does my air only blows out my front vents and not the floor or defrost on your 03 dodge ram?
There may be several reasons why the air only blows out the front vents and not on the floor or the defrost on the 2003 Dodge Ram. The fuses may be blown, or the heating coil is not working correctly.
2001 Chevy luminia car ac blower only blows on defrost why?
Faulty Function selector switch. Consider replacement.
03 astro van A C only blows out of defrost vent where do you look for vacuum hose?
under the dash on the passenger side
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.
Why does your gmc sonoma blow only a little air out and the defrost only blows out the front vents?
why dont bottom vent doors not open on 2001 gmcsonoma
Why does ac and heater on 2000 f350 blow air through defrost when another position is selected ac clutch clicks and air still only blows through defrost?
You have vacuum line leaks somewhere.
Why does cold air only blows from defrost vents on a 1995 Chrysler concord?
Cold air from the defrost indicates that the air doors are in the wrong position. The doors are vacuum controlled in most vehicles. check the vacuum system for a leak.
1994 cougar Air only blows out defrost vents?
The first thing that you need to check will be the vacuum hoses for leaks, breaks or loose fitting ones.....
What would cause high pressure in a 1997 Dodge Ram ac system It started cycling on and off when the heater was on during the winter It currently blows warm air?
The systems AC system will run when the defrost is turn on.The manufactor does this to remove humity from the air making it easier to defrost the windsheild.The AC system should only run when the defrost is on though.If you are experiecing a high pressure promblem when the AC is running it is pronbly due to a overcharge of refrigerant.
