Question about 2004 Ford Expedition

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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?

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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 www.heatertreater.net. There is an inexpensive effective fix available that replaces the cheap plastic door with steel that will outlast the vehicle.

Posted on Jan 04, 2011

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Posted on Jan 02, 2017

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1 Answer

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

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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.

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The heater in our 2004 jeep did not heat the cab very well this winter. I change the thermostat and did a heater core flush but it didn't seem to help much. What else might it be ? Thanks ....Bruce...


might be the damper door stuck..are you getting full air flow thru all vents and defroster but it is just cold?
if full flow but cold..most likely damper ..
see my tips section about heating troubleshooting for diagrams

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1 Answer

My Air Condition is only blowing hot air in the front, but cold in the rear. Could anyone give me a start in correcting this problem? Thanks


possible blend door actuator faulty, or a faulty blend door. This door switches from hot to cold vents. On expeditions equipped with rear AC front and rear AC have seperate actuators. Hopefully this helps!!

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1 Answer

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With your front heat working the most likely cause for the rear heat not to work is that there is an obstruction in the line that is preventing the warm coolant to get to the rear heater core or the rear heater core itself is plugged and not circulating. Another possible cause could be low coolant level where the system has enough coolant to provide the front system with enought warm coolant but not the rear system. Hope this helps

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

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1 Answer

No back heat in Expedition, Blows cold air but front works fine


Shelly,

Buy used parts at car-part.com. Look on page with * to find the cheapest part. Coud be your temp blend door (#2) may not be moving back and forth. Or, you are not getting hot water to the rear heater core.

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You may have to crawl under the truck and feel the heater hoses to see if they are hot. You will find a group of 4 lines, 2 for heater and 2 for a/c. If hot, you know hot water is getting back to the heater core. If not, there may be a hot water vave that's not working. Not sure if EXP. has a water valve for rear.

Let us know what you you find. Good luck.

Feb 22, 2009 | 2000 Ford Expedition

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