thumping sound
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Joined: Feb 2007
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thumping sound
I have a 2004 Expedition Eddie Bauer. It has the power third row seats which stay down much of the time. Last week, the Mrs. put them up; they went up fine but a 'thumping' sound started in the 'wall' over the rear tire on the passenger side. After a few hours, it went away. We went on a roadtrip this weekend and it started again....about every 10-15 seconds......thump.......thump, etc. Just about 2/3 of the way from the liftgate to the back door on the passenger side. The seats still go up and down with no problem but the thumping is driving me nuts. Any ideas? What else is in there besides the motor for the third row power seats?
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Joined: Sep 2003
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From: NC
I have a 2004 EB and the thumping sound in that area is usually having to do with the rear air. When my started it was a fray in the belt that runs the fan. I have read on this forum about the blend door also.
Posting Guru
Joined: Feb 2008
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Sounds like a blend door. There are two in there, one for the temp mix one for floor/ceiling outlet selection. The one for the floor/ceiling is easy to do, the other one is harder. The part is around $25 on line, $50 at the dealer. try changing the floor ceiling selector when you hear the noise, if it stops then that is the one.
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Joined: Mar 2008
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Mountain Boy,
The same thing just started this morning on my Nav. Its a 2004 also, and my wife used it last evening and i thought she'd done something somehow. I have to go on a business trip and I'm carpooling with co-workers and hoping the the thumping stops. I wont be able to have it looked at until I get back but hopefully its as simple as some of the solutions stated here.
good luck.
The same thing just started this morning on my Nav. Its a 2004 also, and my wife used it last evening and i thought she'd done something somehow. I have to go on a business trip and I'm carpooling with co-workers and hoping the the thumping stops. I wont be able to have it looked at until I get back but hopefully its as simple as some of the solutions stated here.
good luck.
Posting Guru
Joined: Feb 2008
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If it is the easier of the two motors you can unplug it yourself to make it stop by taking off one trim piece. You need to remove the change tray or whatever you'd call it under the quarter window. The motor is right there, just unplug the electrical connector. Another 10 minutes and you can have it out and replaced. not sure what the dealer would charge for it but that one is a pretty easy job.
Cross-Country
Joined: Sep 2006
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Part is called blend door actuator no big problem to remove and replace it can be a knuckle scraper to get to the "hard one" without removing the whole trim piece. i think it was one electrical connector and about 4 each 5/8" hex screws worth of work once the trim is removed. very common problem and one you can definately save money on if you do it yourself. dealer qoutes on a thread last year ran from 250-400$ it's a 45$ part and about an hour at the most. good luck and go ahead and fix it because it will drive you crazy in the summer---when replacing you can use the "stem' from the old one to help align the new one or have a helper move the temp selector for the rear heat back and forth until the actuator sldies in (not a problem if you removed the trim). good luck
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