Question about 2004 Ford Expedition

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2004 Ford Expedition XLT, front blend door actuator

I am having a problem with my Expedition, when I press the button for the heat to blow through the back floor it doesn't work. The heat will only blow from the roof. I turned the knob for rear control and pressed the button from the back, it still doesn't work. So, the floor vents are not working, just only the roof air vents. I have the same problem on my 04 Expedition XLT, but with my front vents. Fan and temp controls work fine, but the vent doors have stopped working. I only get air through the defrost vents. Is this my front blend door actuator?

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  • scorreajr May 26, 2009

    I was told that on the 2004 their was no vacuum, it was electric.

  • scorreajr May 26, 2009

    Ok, thanks. Any advice on what to look for under the hood in regards to the vacuum. Is this a hose, a rip or maybe a clamp that has fallen off?


  • scorreajr May 26, 2009

    it's a manual switch or nob on the dash, but was told that the 2004 did not use a vacuum to push air through the vents, but I guess they where wrong.

  • scorreajr May 27, 2009

    It was the small vacuum tube, it's black and is the size of a ball point pen tube. On my 04 Expedition it was on the LH side on the back fire wall next to the battery, it's at the top of the fire wall real easy access. It looked like the battery leaked some acid on the tube and it came off. Once I cleaned it out and put it back on, I started the truck up and presto I was back in business. Let me if you have any questions.

    Thanks for all your help guys


  • fullercon853 May 11, 2010

    I'm having the same problem. Did you find the leak or is it just stuck? Thanks, Chris

  • Jeff Hammack
    Jeff Hammack May 11, 2010

    vacuum comes from the engine and is stored in a cannister located on the right side fender well behind the battery tray

  • Jeff Hammack
    Jeff Hammack May 11, 2010

    your blend door affects temperature of the air coming out of any vent, the vent it comes out of is a function of the selector switch, which directs the air to the desired location. is you system electronically controlled or vacuum?

  • yadayada
    yadayada May 11, 2010

    the blend door is electric, not the mode control doors, which is your problem.

  • yadayada
    yadayada May 11, 2010

    this is not blend door problems, blend doors control temp. You have a loss of vacuum, check under the hood and make sure the AC controls have vacuum from the engine.

  • Anonymous Mar 24, 2014

    On my 2007 Ford Expedition XLT EL, no heat will blow out of the front vents, front floor vents, or the roof vents But it will through the rear floor vents. And you can hear the actuator door switching from cold to hot but no heat. Can someone please help me?


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No airflow (cold or hot) through main vent ducts. Can hear the blower working, can feel air coming from in and around the dash area. Seems lik something is blocking the majority of air from coming through the vent openings. They(vents) are open but no air.

Posted on Aug 06, 2011

  • badfrank619 Aug 06, 2011

    The guys that mentioned that it was due to a loss of vacuum are absolutely correct. Its a tube located on the firewall right next to the battery. The hose connects to a 3-way T-fitting assy.

    If you can locate the windshield tubing and where it connects to, The tube is right below that, it follows another line to the same firewall seal.

    I had the same issue, the tube had actually disintergrated, so I clipped the end of the longer piece and reconnected it. Started up the car and just like that I get airflow coming out the main vents.


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

Posted on May 27, 2009

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2004 ford expedition ac blows cold on floor but not up top

Posted on May 23, 2011

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1 Answer

How to fix rear heater not blowing out vents can hear rear blower motor blowing also rear floor is blowing cold air

The rear heater will use vacuum or an electric motor to control a blend door to direct the airflow. This may be a big job to access this blend door actuator for testing as the interior paneling will have to be removed. If there is no heat available to the rear, check the coolant level to make sure it is full.

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How to remove an actuator on 2001 ford f150 xlt

You need to google 2001 f150 blend door actuator replacement. It is slightly right of center above the plastic duct work for the floor area. All lower dashboard plastic is removed to get at it.
Then the ducting is removed.

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My heat works great in the front but the rear vents only blow cold

The blend door actuator is located in the left rear quater panel. It's right there when you remove the trim panel (left side rear) Below is a picture of it when panel is removed along with another picture of the air duct system. I also gave you a picture of the connector at the actuator. Make sure you are geting power and test opening and closing. Worst case you could make the blend door stay to where you are geting heat until you can repair the problem...11_6_2012_12_34_03_am.jpg11_6_2012_12_34_21_am.jpg11_6_2012_12_34_35_am.jpg11_6_2012_12_34_48_am.jpg

Nov 05, 2012 | 1999 Ford Expedition

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Have a 2004 ford expedition, heat will blow out rear vents but blows cold air out the front.

you need to have automatic ac and heater control checked out at a garage problem could be in the mode switch or electrical problem causing front blend door actuator not working properly.your vechicle has the EATC SYSTEM which is computer control need diagnostie equipment to fix.

Dec 11, 2011 | 2004 Ford Expedition

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I have 2004 eddie bauer expedition and when I turn the knob from cold to hot the air never gets warm only blows out cold

more than likely your blend door or actuator is bad to replace blend door is a large job dash has to come out

Jan 20, 2011 | 2004 Ford Expedition

1 Answer

2004 Expedition - rear heat blows cold air only. I'm told that the blender or damper door is likely broken. Does anyone have a diagram of the rear heating system I can follow to replace this part?

The Expedition uses the same HVAC system as the Ford F150 pickup truck. The Expedition is a little tricky though because you have to remove the center console and floor heat distribution vent to access the actuator motor. Once you remove the motor, you can examine the blend door axle for cracks or breakage. This is a common fail mode on the Expedition.

HeaterTreater is the world's leading company for aftermarket blend door fixes and has a product for the Expedition. Additional diagnostic information and pictures are available on the Ford Expedition HeaterTreater Ebay listing or the web site at There is an inexpensive effective fix available that replaces the cheap plastic door with steel that will outlast the vehicle.

Jan 04, 2011 | 2004 Ford Expedition

2 Answers

The heat dosent blow hot in the front but blows

have the front blend door and actuator inspected to see if operational.

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2004 Ford Expedition rear floor cool/heat

Item Part Number Description 1 — Air inlet door 2 — Temperature blend door 3 — Headliner airflow 4 — Auxiliary mode door 5 — Floor airflow 6 18476 Heater core 7 19860 Evaporator core 8 19805 Blower motor
The auxiliary A/C and heating system has the following features:
  • The auxiliary A/C and heating system is functional whenever the instrument panel mounted A/C control is in any position except OFF.
  • The auxiliary blower motor recirculates the air inside the vehicle. Outside air is not available to the auxiliary system.
  • Air is cooled and dehumidified by the auxiliary A/C evaporator core only if the instrument panel mounted A/C control is adjusted to a position that requires A/C compressor operation.
  • The temperature blend door and the auxiliary mode door are controlled by electric actuator motors.
  • Movement of the auxiliary temperature control between COOL and WARM causes a corresponding movement of the temperature blend door to mix air flowing through and around the auxiliary heater core.
  • Movement of the auxiliary mode control between PANEL and FLOOR causes a corresponding movement of the auxiliary mode door to direct air flow between the panel (headliner) registers and the floor duct.
I would say the auxiliary mode door (#4) electric motor is not wokring.

Auxiliary Blend Door Actuator —Air Distribution Removal and Installation
  1. Remove the RH quarter trim panel cup holder and access panel.
  1. Remove the screws.
  1. Disconnect the blend door actuator electrical connector.
  1. To install, reverse the removal procedure.

Jan 14, 2009 | 2004 Ford Expedition

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