I have an 03 expidition.Went up north this last week and tried to use the rear heat but only cool air came out(kinda like the vent was on)but the front heats good.Also, about the same time a clicking or thumping noise started inside the rear passenger side quarter panel.The front heats and cools fine, just the back.Are these two problems connected or different.Any help would be greatly appreciated.
Thanks

 

noone to help a brother out....bump

 

Have you varies both the front and rear controls? Do you have conventional controls or EATC (digital)?

 

i have the conventional controls...no digital.No matter how you turn the front or rear controls,there is still no heat in the rear.But I did find on here that by setting the rear control to just past the cold side that the thumping sound seems to stop.Now just need to find a way to get the heat goin..
Thanks

 

I have the same problem.

Found this on the web...

http://wiki.answers.com/Q/What_could...r_is_turned_on

Does this sound like your problem? It does mine for sure.

I'm going after a "blend door actuator". I think you can see it (not sure if you can replace it) by pulling out the cup holder and item tray from the rear plastic trim piece.

I'll keep you posted on how my fix goes.

E

 

I had the same "thumping" noise in my 04 Expy when using rear ac/heat. Ended up being the actuator.

 

DKhender...Thanks for adding to the post.

Did you replace your actuator yourself? If so, did you pull the whole interior plastic trim panel out or have sufficient access through the removed trim pieces (cup holder, goodie tray etc.).

 

Mine was covered under extended warranty, so I had the dealer do it. However it must be quite involved, because I saw on the write-up the labor charge was 2 hours.

 

Here is the text of another thread on this...not written by me, but it worked for my 04. there are two actuators, mine was in the easy one.

Tools Required: 5/16" socket (small driver is better than larger in my opinion), phillips screwdriver, Torque head socket, and maybe a flathead to jimmy the trim off in some spots.
Parts Required: Got mine from Oriellly Auto Parts ($34) it's a Dorman Heater Blend Door Acutator Part # 604-202

"Easy" One
1. Simply Pop off the Long Change/crap holder underneath the rear passenger side glass. (Snaps right out with a little pressre but be careful).
2. Turn on your car and adjust the Rear A/C until you hear the thumping.
3. You will see the Rear A/C unit and right on top is an White/Opaque square box. Unplug the wiring harness from this box and see if it stops. If it does you are in luck! If not see "Hard" One
4. Pop out the cup holder just in front of the open trim hole (you will need to to get another hand in there)
5. Use your 5/16" socket and remove. Place the new part in it's place.
6. Make sure you align the pin (Do this by pluging the wiring harness into the new unit and have someone adjust the Hot/Cold until the pin lines up and the new actuator slips in correctly and the bolt hoes line up.
7. Bolt in and Test....Replace the trim and you are done.

'Hard" One
1. Do above precedure until step 3 if the thumping does not stop put the wiring harness back in "Easy" one and locate the 2nd actuator which is a little farther forward and along the side next to the trim. Disconnect that wiring harness and verify the thumping stops. If it does not stop...Sorry you are SOL for this thread. If it does stop, make sure you have a couple hours to devote to replacing this. If you don't just leave it disconnected until you have time (at least the thumping has stopped but you will likely have drastic temps in the rear)
2. Now you basically need to remove the rear trim panel enough to get the space to remove this unit.
3. Below is the order I would take the trim off...Just need a little force to get the clips out
A-remove the spare tire lid, and jack
B- remove the skid trim
C- remove the black jack liner 5/16" socket and a rubber gasket and it snaps out
D- remove the top center trim
E- Use Torque head socket to remove the top seat belt bolt
F- unscrew the plastic screw which hold down the rear panel trim "ear" to the frame
G- snap off the upper Corner post trim enough to get the rear panel snaped out
H- snap off the rear panel enough so you have some room to work (there won't be much but there is enough to get in there) otherwise you will have to take the entire panel off which I did not do.
4. Unbolt the actuator 5/16" socket Qty 4
5. Place the new part in it's place.
6. Make sure you align the pin (Do this by pluging the wiring harness into the new unit and have someone adjust the Hot/Cold until the pin lines up and the new actuator slips in correctly and the bolt hoes line up.
7. Bolt in and Test....Replace the trim and you are done.

Took me about 2 hours becuase I was scared i would tear up the trim and thought the whole panel needed to come off but now I could do it in about 30-45 minutes.

 

I have an '04 Expy and have had the same problem "twice". The first time it was the actuator, the second a plastic gear had stripped in the unit. The first time the truck was under warranty and the second it was not. I called Ford and they fixed it for for free anyway. You would be well served to replace much stuff as you can while you are in there or while a mechanic is in there. This is the only repeat issue that I've had so far. 49K and still going.

Good luck

Tim

 

Well thanks to all who responded.I did find out that it is "the hard one" so now I guess its time to go to work.Got it unplugged for the time being.Weather is nice enough.Thanks

 

You can manually move the blend door to make it reasonable until you get to the real fix. The final drive gear has a .200 square hole in it that you can put a right angle screw driver into and rotate it.