Question about Buick Century

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The air distribution selector is completely inefective. is this vacume controled?

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  • jalawbaugh Mar 28, 2011

    2001 Buick Century six cyl custom

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Depending on your year and make/model

Posted on Mar 28, 2011

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1 Answer

Blower motor will not blow out of vents 2008 ford ranger


Climate Control System Condition Possible Sources Action
  • Incorrect/erratic direction of airflow from outlet(s)
  • No vacuum to the function selector switch
  • Function selector switch leaks vacuum
  • Air distribution door binding/stuck
  • Vacuum line kinked/pinched
  • Vacuum control motor
  • Vacuum reservoir tank
  • Vacuum actuator arm not connected to the door lever
  • Go To Pinpoint Test A .

Jun 15, 2015 | 2008 Ford Ranger

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Why does the interior of my car smell like antifreeze when I put the mode selector control to panel?


You may have a leak in your heater core, or the line going to or from it.

Jul 27, 2014 | 2000 Ford Taurus

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No vacum to selector switch for air conditioning


no vacum to selector switch for air conditioning on a1998 chevy malibu

Aug 05, 2010 | Chevrolet S 10 Cars & Trucks

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'06 Silverado 4.8L Air Vents selector does not open and close any vents anymore. Stuck in the Defrost/Feet position.


Look for vacum hose under hook going into fire wall, check for vacum if none add vacum or look for vacum hose hanging some where and reconnect.

Dec 17, 2009 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

Vent selctor works but vents dont change


the mode selector is actuated by Bowden cables. When you turn the selector switch, the cable winds on a spool and that rotates the mode door. the cable may have come off either end. You need a U shaped set of radio puller tools that go in the 4 holes in the front of the radio. Then you slide the Us to the outside to compress the clips and allow to pull the radio out. Then there are 4 screws to remove to remove the finish bezel. Then 3 screws hold on the climate control head.

With the radio out, you can rotate the selector knob and see what it is doing. If you remove a cable, rotate it counterclockwise fully before disconnecting it.

You can buy a whole head for $10 used at car-part.com. look on page with * for lowest cost part. You can use 2000-07 contol head.

Please rate, thanks
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Air distribution operating cables
The air distribution switch operates with two Bowden cables. The cables operate the air distribution valves in the heater housing.
To remove and install the cables, the rotary switch must be turned as far as it will go to the left. The air flap mechanism engages easily in this position, making the installation of the cables easier.
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  1. Remove the radio/cassette unit and the CD player (if equipped). For additional information, refer to Section 415-01 .
  2. Using a common radio remover, detach the audio unit.
  3. Insert the common radio remover into the locating holes. Pull the tools gently to the outside of the audio unit to release the locking tangs.
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  1. Slide the audio unit out of the instrument panel.
  2. Remove the bezel with heater/air conditioning controls.
  3. Remove the bezel with heater/air conditioning controls (continued).
    • Pull off seven electrical connectors (six shown).
  4. NOTE: To remove the Bowden cables, turn the rotary switches as far as they will go to the left.
    Remove the bezel with heater/air conditioning controls (continued).
    • Unclip the Bowden cables.
  5. Remove the lower driver's side footwell trim.
  6. Unclip and remove the air distribution Bowden cables.
  7. Unclip and remove the temperature control Bowden cables.
    • Unclip and remove the temperature control Bowden cables.
Installation
  1. NOTE: Route the new Bowden cables without kinks and check for easy accessibility.
    NOTE: To install the Bowden cables, turn the rotary switches as far as they will go to the left. The mechanism engages easily in this position.
    NOTE: The Bowden cables are identical for RHD and LHD vehicles, although they are fastened to the air flap operating mechanism with the reverse side of their connectors.
    Install the components in reverse order.
  1. Check operation of the Bowden cables

Sep 18, 2009 | 2005 Ford Focus

1 Answer

My AC air registers only have air coming out of the defrost ducts


In every car, there are fins or flaps inside the dash that rotate that distributes the air flow from the blower to the desired opening, ie defrost, floor etc... This flap is controlled by a linkage which is connected to the selector switch. It may be the linkage is no longer connected, or the fins inside the dash are stuck. If the selector switch moves freely with little or no resistence its possible the linkage is no longer connected, otherwise the flaps need to be physically looked at.

Aug 09, 2009 | 1989 Ford F 150

1 Answer

A/C problems with blower and position selector


sounds like it is vacume operated check to see if all vacume hoses are connected to the control switches and vent controls. i suspect somebody has caused a hose to disconnect tampering under the dash

Jun 07, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

2007 F-150 Supercrew Lariat Cabin Air Filter


According to the shop manual you do not have one.
Air Distribution and Filtering adobe.gif Printable View (79 KB) NOTE: The air distribution system of this vehicle cannot be equipped with a cabin air filter.
There are 2 sources of air available to the air distribution system:
  • Outside air
  • Recirculated air
Recirculated air is automatically used when the electronic manual temperature control mode selector is set in the MAX A/C or OFF modes and can be selected in any mode other than MAX A/C, OFF or DEFROST by selecting the RECIRC button. Recirculated air is available in all modes except DEFROST. If the vehicle is equipped with an electronic automatic temperature control (EATC) system, recirculated air is used in OFF and is available in all modes except DEFROST. RECIRC mode is a timed function in FLOOR and FLOOR/DEFROST.
Air distribution within the vehicle is determined by the electronic manual temperature control (EMTC) function selector switch position, or is controlled by the EATC system in the AUTOMATIC mode. The air distribution mode on EATC vehicles may be overridden by the driver if desired. Air distribution doors are used to direct airflow within the heater core and evaporator core housing and the plenum chamber. An electronic mode door actuator is used to position these air distribution doors. One air inlet mode door is used to switch between FRESH or RECIRC air inlet. An electric actuator is used to position the air inlet mode door.
Air enters the passenger compartment from the:
  • instrument panel A/C registers.
  • heater outlet floor ducts.
  • windshield defroster duct.
  • side window demisters.
  • center flow-through console (if equipped).
Passenger compartment air is exhausted from the vehicle through open windows or body air vents.

Mar 08, 2009 | 2007 Ford F-150 Harley Davidson

1 Answer

I have the same problem with my windstar blower is fine but is coming cold air but no heat i dont know what to do can any one show me how to fix it thnx


First, feel the heater hoses going into the firewall under the hood. If they are hot, then you have hot engine coolant going into the heater core. If they are not hot, then you either have a bad thermostat or you are very low on engine coolant.

Next you need air flowing through the heater core so it can come out heated through your vents. If the iar is flowing somewhere else, your temp blend door is not moving because the bend door motor is bad or your temp knob on your heater controls is bad. The blend door motor is an electric motor.

------------------------------------------------
Air Flow Control
Air flow control is accomplished in the following manner:
  • Primary control is through the function selector knob , mounted on the heater function selector switch, which is part of the heater control .
  • The function selector knob has the following positions: OFF, PANEL, PANEL/FLOOR, FLOOR, FLOOR/DEFROST and DEFROST.
  • The heater function selector switch combines a vacuum selector valve with an internal electrical switch.
  • The vacuum selector valve directs source vacuum to various vacuum control motors (18A318) . Refer to the System Airflow Schematic and Vacuum Control Charts.
  • An internal single-pole electrical switch is also controlled by the selector. The switch controls the electrical supply to the heater blower motor switch (18578) .
  • The position of the function selector knob determines the manner in which the system will operate.
  • Each position of the function selector knob is detented for positive engagement.
Temperature Control
The temperature control operates in the following manner:
  • Temperature control of the heater system is determined by the position of the temperature control knob (between COOL-BLUE and WARM-RED) of the heater control .
  • This control knob is connected to a potentiometer mounted in the heater control . This potentiometer is electrically connected to the electric blend door actuator that operates the A/C air temperature control door.


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  • Movement of the control knob from COOL (Blue) to WARM (Red) causes a corresponding movement on the air temperature control door and determines the temperature that the system will maintain.
System uses a reheat method to provide conditioned air to the passenger compartment.
  • All airflow from the blower motor (18527) passes through the A/C evaporator housing .
  • Temperature is then regulated by reheating a portion of the air and blending it with the remaining cool air to the desired temperature.
  • Temperature blending is varied by the air temperature control door, which regulates the amount of air that flows through and/or around the heater core (18476) , where it is then mixed and distributed.
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inside you plenum box:

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Mar 03, 2009 | 1998 Ford Windstar

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