Auto Temp issue...'06 Limited

[infideltarget]

My wife's '06 Limited has the auto temp control (seats etc). A few days ago, she told me it has a small hiccup. The blower fan only runs on high. Regardless of the setting on the control, the fan stays running on high. It doesn't matter if she uses the controls on the panel, or the steering wheel, it blows on high. All other controls work...temp changes, she can move the air from vents to floor to defrost, and when she presses the fan speed buttons, the panel shows that the speed should have changed. But it does not. When she pushes the "off" button, the fan will not turn off. The panel shows "off", but the fan continues to run on high. When she turns the vehicle off, it will turn off. When she turns the vehicle back on, the fan will remain off, until she turns on the A/C...then the fan goes to high speed...and remains there until the ignition switch is turned off, regardless of what she pushes.

Any suggestions on how to fix this? Or am I looking at a new (used) controller?

 

[ELVATO]

It's probably the speed control. Even though you have the DATC/EATC, it still uses the resistors to change the fan blower output.

First, though, you might need to check something else.

With the key OFF, disconnect the plug going in to the speed control. You'll have to get on your back, and look in "into" the area above the fuse box (front passenger floor). You should see something like this:

Turn the key ON (but not START), and select Panel on the AC control. Change from speed low to high. Does the blower operate?

If you want to just change out the speed control, unscrew the screw marked by "1" in the picture, disconnect the plug, then pull straight out.

 

[infideltarget]

Thanks vato! I did some more searching and found this identical problem.





http://expeditionforum.com/showthread.php?t=5586

 

[ELVATO]

No problem. Maybe I should have searched, would have saved me the time I took to type up my other response

I see you are on the other forum as well. I would price out the part from the Tascaparts forum sponser there. They are usually a great deal cheaper than dealer cost.

 

[infideltarget]

Will do. Thanks again!