Question about 1999 Buick LeSabre

1 Answer

Auto Temp Control Distribution

The a/c blows cold but airflow is only thru the Deforst and Floor. No airflow from the Dash Vents.

Why?

Posted by on

  • Anonymous Jul 20, 2008

    a/c blows only thru defrost and floor.93 le sabre I only changed spark plugs last night,now a/c prob

  • javatown Jul 22, 2008

    I'M told it is the programer for the Baffel and it is over $700. just for the part

    I can't afford thios kind of price as installed it is $834.00

×

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 58 Answers

Could be plugged or the vent is broken

Posted on Jun 30, 2008

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Heater blows air thru floor vents and dash vents but no air thru defrost windshield vent


Suspect a defective blend door actuator motor that controls airflow for the defrost. This electric motor may be defective and in some makes and models can be extremely difficult/expensive laborwise to replace

Jan 05, 2016 | 2008 Jeep Patriot

1 Answer

No heat just cold air


Is the gauge showing the engine is warming up to normal temp ?
Are the heater hoses getting hot ?
If the heater core is getting hot, it could be a blend door problem. The blend doors direct air thru the heater core and the ac evaporator among other things.

Dec 06, 2012 | 2005 GMC Yukon

1 Answer

Air conditioning will not switch from defrost vents


Vacuum control motors are used to position these airflow control doors.
SECTION 412-01: Air Distribution and Filtering 2000 Expedition/Navigator Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 06/17/1999 Air Distribution There are two sources of air available to the air distribution system:
  • outside air
  • recirculated air
Recirculated air is only used during MAX A/C, AUTOMATIC (if equipped with EATC) and OFF modes.
Air distribution within the vehicle is determined by the function selector switch position, if equipped with manual A/C, or is controlled by the electronic automatic temperature control system in the AUTOMATIC mode but can be overridden by the driver if desired. Airflow control doors are used to direct airflow within the heater air plenum chamber. Vacuum control motors are used to position these airflow control doors.
The air distribution system is designed to provide airflow from the defrost nozzle when no vacuum is applied to any of the vacuum control motors. This is done to prevent a situation where defrost cannot be obtained due to a system vacuum leak.
Air enters the passenger compartment from the:
  • instrument panel A/C registers.
  • heater outlet floor duct.
  • windshield defroster hose nozzle.
  • side window demisters.
  • rear seat airflow duct (if equipped).
Passenger compartment air is exhausted from the vehicle through open windows or cab air vents.


expedition air flow hvac system-xvcmtr1jbqa4kfrdszeh0lpe-3-0.gif Item Part Number Description 1 18A318 Vacuum control motor - panel/defrost door 2 18A478 Panel/defrost door (full vacuum position) 3 - Defrost airflow 4 - Side window demister airflow 5 18B545 Temperature blend door (full heat position) 6 19860 A/C evaporator core 7 19A813 Air inlet duct door (full vacuum position) 8 - Outside air inlet 9 18A318 Vacuum control motor - air inlet duct door 10 - Recirculated air inlet 11 19805 Blower motor 12 - Vacuum to emission control 13 - Vacuum from the engine intake manifold 14 19A563 A/C vacuum check valve 15 19A566 A/C vacuum reservoir tank and bracket 16 19B888 A/C-heater function selector switch 17 18476 Heater core 18 18A559 Floor/panel door (full vacuum position) 19 - Floor airflow 20 18A318 Vacuum control motor - floor/panel door 21 - Panel vent airflow
Check vacuum control to the panel defrost motor ( vac,diaphragm )

Nov 01, 2017 | 2001 Ford Expedition

1 Answer

Blows cold but only thru top dash vent


Sounds like you have a problem with your blend door in your air distribution box behind the dash. Somebody needs to get in there and figure out why it won't switch from defrost to the vents or floor setting.

Sep 23, 2010 | 2001 Ford Windstar

2 Answers

Nothing blows out dash vents, but will blow out thru defrost nad floor vents on 1999 buick PA with dual auto air controls


check for a vacuum leak in the hose going to the heater controls. Goes from engine compartment, through firewall, into dash to control head. Also, has a vacuum storage canister under hood. When system fails, it defaults to defrost.

Jul 30, 2009 | 1999 Buick Park Avenue

2 Answers

Why is my ac not blowing hard thru the vents?


check vacuum lines under hood for leaks

Jun 28, 2009 | 1998 GMC Jimmy

1 Answer

1996 ford mustang convertible ac blows cold only from defroster


Does it still blow out the floor and defrost when you set the switch to those positions or does it alway blow out the defrost no matter what? If you can get air to blow out to the floor, then it sounds like you lost the switch that controls the airflow to the vents. If it only blows out the defrost, then you probably lost the vacuum to all of the switches. When the vacuum is lost, it will only blow out the defrost. Check the smallest line on the vacuum distribution block located in the corner near the brake master cyclinder. That line provides the vacuum to control the direction of airflow within the cabin.

Jun 08, 2009 | 1996 Ford Mustang

2 Answers

A/C blows cold on floor and windshield, not thru dash vents


you have a vacuum leak check the vacuum hoses behind the controll panell

Jun 05, 2009 | 1991 Buick Park Avenue

3 Answers

2004 Ford Expedition XLT, front blend door actuator


Hope I was avle to help, glad you up and going.

May 26, 2009 | 2004 Ford Expedition

1 Answer

Air will not change from floor to dash to deforst outlets


Hi wayner, There is a cable that need to be adjusted that is under the steering wheel. look under there and you will see 2 cable that can be adjusted. These cable open and close the air blend doors.

Mar 28, 2009 | 2000 Hyundai Accent

Not finding what you are looking for?
1999 Buick LeSabre Logo

Related Topics:

129 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts

yadayada
yadayada

Level 3 Expert

77194 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...