Question about 2004 Chevrolet Cavalier

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The heater isn't working properly

The heater only works in the vent position (only blows out of the vents)...no matter what the switch is set at. Problem?

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Vacuum leak. Check the vacuum ball.

Posted on Jan 05, 2009

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1 Answer

Air blend door actuator


Possible bad blend door actuator .some gm cars can be relearned to the new climate control head

Jul 28, 2013 | 2001 Oldsmobile Aurora

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My 05 Z71 tahoe blows air out of the front defrost vents no matter what setting its on. Also my check engine light is on.


The first thing I would do is have the computer checked for trouble codes. The codes will point you in the right direction to look for the problem. The codes may be for something other than the vent problem.
The air is directed thru the heater core and evaporator core and also to the correct vents by blend doors in the ductwork under the dash. They are usually controlled by small electric motors.

Jul 26, 2012 | Chevrolet Tahoe Cars & Trucks

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A/C will only blow through defrost vents


Common question on this site. On late model cars, the vents are controlled by blend door motors. Small electric motors open and close doors to direct air flow.
Chances are you have a blend door that is stuck or a failed motor.
The default position is the defrost to make sure the windshield is always clear.
Someone will need to look behind the dash to see if all of the doors will move on demand.

Jun 27, 2012 | 2006 Acura TSX

1 Answer

So I have a 93 chevy 2500 and the air blows from all vents at once no matter what, qhat could it be?


a small motor switching vents position. Usually located behind glove comp, on the heater.

Sep 15, 2011 | 1993 Chevrolet C/K 2500

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My heater works marginally and more often than not blows no warm air. The coolant level is OK and the engine temperature seems normal. Long before this happened the heater switch had a problem in that it...


I would flush the coolant system first with a good flush, because alot of times the heater core will get partially clogged causing this problem.Or you may want to replace the heater core.

May 10, 2011 | 1999 Chevrolet S-10 Pickup

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Front defogger blows out heater vent when set on DEF. All of the heater, a/c, settings work properly. One day, I turned on the DEF and the warm air blows out of the heater vents, not the defroster area. I...


Sounds like the flap valve in your vent system that allows air to go to the defrosters is either jammed or broken. Unfortunately you will have to take the vent system apart to look.

Nov 05, 2009 | 1989 Oldsmobile Cutlass Ciera

2 Answers

1996 chevy blazer my air on heater will not blow


the idea of the switch is run on vacuum and is not making contact with the switch it self either worn contacts in the switch itself **** as an obstruction as well or the vent door is stuck in just that position either behind the glove box or the ash tray are the vacuum lines one of them may be pinched off or the door needs a bit of help until you can free it up

Sep 08, 2009 | 1996 Chevrolet Blazer

3 Answers

2000 ford taurs a/c dont work it blows cold when i power up the compressor.its running 45 lbs on my gage on the low side.


Hi...
Perform the following basic Checks and Information
1. Check Drive Belts,If belt is intact proceed to the next step.
2. Check for Compressor Clutch Engagement - Turn the air conditioner to the "on" position and set controls to the coldest setting. Start the engine and allow to idle. Then open the hood and inspect the clutch at the front of the compressor, is it turning? "Engaged" if so, the system has enough refrigerant to activate. If the system is low on refrigerant it will not work properly. In this case an air conditioner recharge kit is needed to recharge the system. If the compressor clutch is not turning proceed to next step.
3. Inspect for Refrigerant Leaks
4. Check under dash panel and under hood power distribution center
5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the vent door is not functioning properly it will cause warm air from the heater to exit the vents. To check this start the car and allow the engine idle, next turn the blower motor speed on low, switch the temperature control from warm to cold while your ear is close to the vents. You should hear the door move inside the heater box as it swings from open to close. If not, inspect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.
Thanks
Smith

Jul 31, 2009 | 2000 Ford Taurus

1 Answer

2001durango vent only blows air through face vent and defroster.


the vent door is broke in the heater control box under dash

Feb 13, 2009 | 2002 Dodge Durango

1 Answer

2001 Suzuki XL-7. Heater blows hot one side, cold the other.


No ductwork [to the lower vents] under the dash. They are part of the heater core / blower housing is integrated (all one piece).

After reviewing shop manual, we suspect that one of the three damper flaps is not positioning correctly; or debris has blocked one side (which makes more sense given the symptoms).

We're waiting for the temperatures to get back in the plus numbers to check out the physical arrangement.

Jan 19, 2009 | 2001 Suzuki Xl 7

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