Question about GMC Envoy

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A/c is working but does not come out the vents cold. have been told it is my "blend door actuator". If so, where is it located, what is the part number, do you sell it, is there something that can be done without replacing it?

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The bleed door actuator is located behind the dash in the AC/Heating ducts above or near the heater core box, it mixes heated and cooled air to give the desired outlet temp. You will have to remove the dash to replace the acuator. This is a dealer only part.

Posted on Aug 06, 2008

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Location of blend door actuator, Item 604-106


usually behind the dashboard about in the middle .dash has to be removed to fix .

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The blower will supply air no matter where the blend door is positioned, it will be hot cold or somewhere in between but you will have full airflow, so the blend door or the actuator is not the problem. Find the air intake for the blower (at base of windshield) and make sure it is not full of leaves or if you have a passenger cabin air filter (commonly called a pollen filter) it is not plugged up.

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I'm having the same problem except on mine it's the driver's side that's blowing cold. Do you have the pictures in a finer resolution? I can't make them out and when I zoom, they are too grainy. Does the replacement require removing the dashboard? What's the general cost of the acuators? Are they readily available at like NAPA or other parts stores?

Nov 26, 2011 | 2006 Kia Amanti

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2000 yukon denail front a/c not cold rear a/c is


First of all get the Freon level checked, if Freon/ refrigerant is low then it can cause this problem.Wen Freon is low it takes time to cool.--- So first get Ac pressure tested.It can be tested at any local car garage.Some times pressure will be checked OK, but still if Freon is getting clogged in the line/ tube then it will not reach the front , but reaches rear then front will not cool, but rear will.--------

But mostly this problem is related to blend door.

If the rear is working well and front is not I would suspect a blend door or actuator issue in the front.Double check and see if you can hear anything moving when you are adjusting temperature from hot to cold.Also check and make sure the air flow moves properly from defrost to vents and floor etc.

Either a bad blend door motor or Climate Control Assembly. The A/C heater function selector switch combines a vacuum selector valve for direct control of the vacuum control motors and electrical input to the instrument cluster module.

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The blend door actuator is located behind the glove box.-----

To see blend door diagram for your Yukon Denail, click the link below :---

http://howtobyme.blogspot.com/2011/08/where-is-blend-door-actuator-located-on.html

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This will help.Thanks.Helpmech.

Aug 22, 2011 | GMC Yukon Denali Cars & Trucks

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Heater only blows hot air thru one vent - all other vents blow cold air


This is my best guess with out knowing the year of the vehicle.
If you have a climate control system, ( driver's side, and passenger side heat & a/c setting ), you likely have an issue with the blend door being stuck, or a bad actuater, ( this moves the blend door )

If you do not have a climate control system, you likely have a trap/flapper door sticking, or some blockage in the duct work.

I hope this helps you.

Feb 02, 2011 | Honda CR-V Cars & Trucks

1 Answer

My air conditioner is working but won't blow out


Are you saying the temp blend door is not working?
If yes, it's the control head or the temp blend door motor on th plenum case under the dash. Buy used on ebay.

DO you have manaul or electroic controls?

If electronic

A/C Electronic Blend Door Actuator The A/C electronic blend door actuator is located on top of the A/C evaporator core housing (19A553) assembly.
  • Its function is to move the A/C air temperature control door on command from the control assembly.
  • The A/C electronic blend door actuator 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.
  • A five volt signal is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The expressed value of 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 whichever direction is necessary to make the actuator wiper voltage agree with the control module wiper voltage.
-----------------------------------------------------------
manual

#3 is the blend door.

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May 08, 2010 | 1998 Mercury Grand Marquis

1 Answer

Ac blowing hot air


the blend door actuator located on the air box (right hand side under dash) is prob. inop. worst case senerio the blend door its self is broken. I have replaced the actuator more than anything.

Sep 16, 2009 | 2005 Chevrolet Silverado

1 Answer

2000 f-350 ac only blows through defrost vents


Sounds like blend/diverter door is not actuating. Check to see if blend door(s) actuate when controls are set. If not pry on blend door(s) to make sure they are not stuck. If fluids (beverage) has spilled on top of dash it can cause door(s) to stick. Also check vacuum lines at door and if necessary at control panel switch locations. If door stuck...clean. If no vacuum in lines trace back to find broken, leaking, or clogged lines.

Aug 11, 2009 | 2000 Ford F350 Super Duty Super Cab

2 Answers

Heating system only blows out hot air through the vents


I would look at the air blend doors first, it sound like they are not working or your control in the dash is not working send a signal to them. they work by changing the air from hot to cold or in between.

Avalanche, Sierra And Silverado
  1. Remove the floor air outlet duct extension (1) from the floor duct (2). 0900c152801c9c8a.jpgRemove the floor air outlet duct extension (1) from the floor duct (2)
  2. Disconnect the electrical connection at the blend door actuator (10). 0900c152801c9c8b.jpgBlend door actuator and related components
  3. Remove the blend door actuator mounting screws from the HVAC module.
  4. Remove the blend door actuator as an assembly with the actuator cam. 0900c152801c9c8c.jpgRemove the blend door actuator mounting screws from the HVAC module
To install:
  1. Install the blend door actuator as an assembly with the actuator cam.
    1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
    2. Line up the A/C valve lever with the blend door actuator cam
  2. Install the blend door actuator mounting screw to the HVAC module.
    1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).
  3. Connect the electrical connection at the blend door actuator (10). 0900c152801c9c8b.jpgBlend door actuator and related components
  4. Install the floor air outlet duct extension (1) to the floor air duct (2).
C/K Series
  1. Disconnect the electrical connector to the mode actuator that is located on the left side of the air distribution case.
  2. Remove the screws.
  3. Remove the adjuster links from the control lever.
  4. Remove the mode actuator.
  5. Adjust the mode actuator by completing the following steps:
    1. Connect the electrical connector to the actuator.
    2. Turn the ignition switch to the RUN position. Allow the self-positioning of the actuator.
    3. Turn the ignition switch to the OFF position.
    4. Remove the actuator from the electrical connection. 0900c152801c9c8d.jpgBlend door actuator-C/K Series
To install:
  1. Install the mode actuator.
  2. Install the screws.
  3. Install the adjuster links to the control lever.
  4. Connect the electrical connector.
  5. Test the circuit operation

Nov 27, 2008 | 2001 Chevrolet Silverado

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