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92 lumina and when you turn on the heat or air it will only blow from the floor and defrost it wont blow from the front vents what would cause this problem?
Wiki User
∙ 13y ago
vacuum leak the vacuum reservoir is below the left head light, check the hoses
Wiki User
∙ 13y ago
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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.
'2000 gmc jimmy no floor heat but has defrost and vent heat'?
my 1998 gmc jimmy has no floor heat but i have defrost and ven heat
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.
I have a 2002 Ford Explorer that is get low air flow from the defrost vent when the defrost unit is selected. Most of the air flow is going to the floor vents. Is the blend valve bad?
Hi, It is not the blend door, that is for heat/cold changes. The mode door could be the problem, or stuck defrost door.
Why is my vehicle's defrost blowing cold air when set at warm?
If the temperature cannot be changed for any of the direction settings, e.g., defrost, vents, floor, then the problem is very likely to be the blend door actuator motor.See "Related Questions" below for more
Why doesn't heat blow out floor only?
the heat blows out the defrost when it should blow out floor vents only
Why would a floor bend?
Most likely cause would be the floor has a moisture problem or the floor was not level when it was installed. There is always a chance if it is fairly new that it is defective.
Why does heater go to defrost by it self and back to the floor?
My guess is that you have a vacuum supply problem. Most HVAC systems operate off of a vacuum and if the vacuum supply is cut off the system goes to defrost by default, your most important function. Check under the hood for a cracked or pinched vacuum hose.
Why does Air conditioner work on defrost only and no front vents or floor?
Vacuum leak
Why won't heater change from defrost to floor on 2001 Ford F-350?
you have a fuse out...
Why is your car only blowing air at the feet?
If you can Not change the location of the air flow to the different outlets (defrost, dash, floor, etc) That sounds like a mode door problem or a mode door control knob.
Vacuum lines on caprice the air blows from the defrost and floor but not the vents can anyone answer?
On the back of the intake manifold are some vacuum hoses. Check and be sure all are attached . If they are good the you probably have a blend door problem.
