Question about 1998 Pontiac Bonneville

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No air to vent or defrost fan motor is good and blend door behind glove box opens and closes when switch is put in max ac and can see arm move when chang from vent to defrost also is their any vacuum digrams out there for 1993 Grand am

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NEED TO CHECK A/C AVABURATOR OR CHANG RAGULATOR AC

Posted on Mar 27, 2011

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1 Answer

1999 durango vent control switch will not let AC blow threw vents only defrost


Usually this is a problem with the blend doors under the dash. You either have a vac leak, a dead motor, or a faulty door.
The control opens and closes the doors to direct air thru the heater core and evaporator core along with directing air thru the vents.
When a problem occurs, the default position is the defrost vents to make sure the windshield remains clear.
You can do an internet search for "repair durango blend door" for more info.

Jul 29, 2012 | 1999 Dodge Durango

1 Answer

Air blowing out floor and defrost vents but not not front vents


Sounds like a blend door problem. The vacuum from the engine opens and closes the door that directs air flow thru the vents.
I would guess the door is stuck in the middle of the range or something is blocking it.
The blend door(s) is behind the glove box.

Jul 19, 2012 | 2003 Ford Crown Victoria

2 Answers

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

Hi..i put in the thing in the AC to make it get cool..and hot air still coming out of the vent..its not blowing cold...even the compressor comes on...but only one of the fans come on...can u help me...


The blend door is inside the box where the air flows from outside into the car. The air goes through the air conditioner first, then it goes to the blend door. When the door is open, the air will then go thru the heater and get hot. When the door is closed, the cold air will come out the vents. In this way, the blend door controls how much air goes thru the heater. When you are running the A/C, you want the blend door closed. If your a/c compressor is working but you are not getting cold air, the blend door may be stuck open.
My book shows your blend door is behind the glove box. It also says your door is controlled by a cable. What you should do is look behind the glove box to see what happens when you change the temperature on the panel. It should move a cable behind the glove box that turns a lever on the door. The cable should turn the lever as far as it will go. If it doesn't do that, it is either broken or needs to be adjusted. It may have slipped out of it's clamp. To adjust, loosen the clamp, turn the knob to cold, and push the door fully closed, then tighten the clamp.

Let me know if it doesn't look like what I'm saying or if you have other questions.

Oct 05, 2010 | 1997 Mitsubishi Eclipse

2 Answers

Hi my air flow selection switch not working proparely every time i turn on the heat weather i put it on panel vents or floor vent the only thing that truns on is the defroster vent what do you think is the...


its going to be one of two thins either the blend door is broken or the gears in the blend door motor are stripped happens often these little motors only stop once the door is closed or open but i think the timer is offten too long causing them to break the blend door or strip the motor,remove the glove box and watch them work,they are easy to remove once off you can open them up and inspect the gears,usually the one connecting to motor worm gear is stripped out. good luck

Feb 07, 2010 | 2006 Ford F 350 Super Duty

1 Answer

No heat from vents with climate control. heater core is hot. fan is okay, changed out air blend motor, ac works great, infact it seeems to be on all the time?


Did you change the one behind the glove box door? If so you may have something inside the heater box keeping the door from moving completely open or closed.

Nov 07, 2009 | 1999 Ford Explorer

1 Answer

This car has the automatic temperature control system


The hot/cold switch is probably bad.you have a blend door box that opens to let the cold air in and closes to let the hot air in.From what you are saying this part is no responding to the switch movement.Make sure power is at the switch and power should go through the switch when put on cold air this moves the blend door.Some times the blend door goes bad and has to be replaced its under the dash on the right side.

Aug 10, 2009 | 1999 Mercury Grand Marquis

1 Answer

A/C Blows out at feet or through defroster, not through dash


the ac blend door is out of adjustment or the the actuator is not working look behind the glove box and watch the arm move

Jul 24, 2009 | 1997 Chevrolet Tahoe

1 Answer

AC IS BLOWING WARM, BLOWER OK COMPRESSOR OK..2000 OLDS ALERO SPORT


You have a temp door not open.This could be vacuum related,or it could be a temp door actuator motor gone out.If you are mechanicaly incline,look under dash,behind the glove box and all the way across the ac/heater box/duct.You will find witch vacuum servo,or actuator motor controls the temp door by process of elemination.Move each control (temp,defrost,floor vent recirculation,max air,etc.Watch each one underneth the dash until one of them does not move,this one will be the one to work with manually.Disconect actuator motor completley,or pull the servo to make the door move.If it is a actuator motor,after you remove the motor,you will see a arm type mechanisum to move.This will tell you for sure that this is the actuator to replace.If it is a vacuum servo that is not moving,check for a bad vacuum,or vacuum switch on the ac control/Be sure you have good vacuum under hood going to the firewall(near windshield)Also there might a check valve near the firewall that is bad,or vacuum hose sucked together or split.If I can help you any further.let me know.roniecon@gmail.com

Jul 19, 2009 | 2000 Oldsmobile Alero

1 Answer

1995 lincoln town car heater


the door opening & closing on Max a/c is the inside/outside air intake door.
The temp blend door is the one you are concernd about. It says you have to remove instrument panel for access. ouch!!!

-------------------------------------
A/C Electronic Door Actuator Motor
The A/C electronic door actuator motor (19E616) is located on top of the A/C evaporator core housing assembly.
  • Its function is to move the A/C air temperature control door on command from the control assembly.
  • The A/C electronic door actuator motor contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
  • Battery voltage is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The actuator wiper voltage is sent to the control module and matched with the wiper voltage of the module potentiometer. The printed circuit board then drives the actuator motor in the direction necessary to make the actuator wiper voltage agree with the control module wiper voltage.
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Dec 27, 2008 | 1995 Lincoln Town Car

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