Climate control actuator not working

[Gabriel.marciano@gmail.com]

2004 mercury grand marquis

Hello everyone. I am new to this forum. The unit does not move the air flow from chest level to any other location: also only air conditioning works. Temperature dial does nothing. Air conditioning blow was ice cold. fan speed control works in every position. Can not get any heat. I am thinking it is a electrical problem. Car does not overheat. 50k miles. Please help. Thank you in advance

[AC75]

Not being able to adjust the temperature sounds like the blend door actuator to my limited knowledge. Are there any clicking sounds when you try adjust the temp?

Is your climate control digital, known as EATC? If it is, you can run a self-test on it. Try this: http://web.archive.org/web/200905310.../selftest.html

The directional issue I don't really know about. It's not an uncommon problem, so if no one chimes in here it might be worth posting over at http://www.crownvic.net/ where there will surely be someone who does know more about it.

[sly]

for the EATC it could be the O-rings. or the brain for it is dead. there is a way to test it and get codes from it, but I have no idea how.

[Gabriel.marciano@gmail.com]

I think it's definitely the blend door. Does anyone have a good wright up on how to remove the dash? Hvac controls are analog and all work except for the hot/cold nob.

[sly]

thwn yeah.. blend door. no write up for that year, but look under for braces in the middle of the dash. you should have already found the big bolts on each lower corner correct?

[AC75]

Here's a photo slideshow showing the order of stuff you have to pull out of the way to get to the actuator, it's limited in description but it's a decent enough start and shows you where things are.

https://www.youtube.com/watch?v=faCu7v0xTow

[Gabriel.marciano@gmail.com]

I see the big bolts but was hoping I would not have to mess with them. Guess I chose poorly! Took out about 30 screws...

[sly]

you have to mess with them... then lift and separate

[Gabriel.marciano@gmail.com]

Ac75, that was a huge help. Thank u. Wish I had seen this before removing all the little black screws. I should have clued in when they were at 7 mm screw heads. The bolts that hold the dash up are large as in used to mount the dash as an assembly on an assembly line. Duh.... my bad

[AC75]

Ac75, that was a huge help. Thank u. Wish I had seen this before removing all the little black screws. I should have clued in when they were at 7 mm screw heads. The bolts that hold the dash up are large as in used to mount the dash as an assembly on an assembly line. Duh.... my bad

You can just call it a learning experience!

Here's a few other links worth looking over for tips/pictures:

Pulling Dash To Replace Blend Door Act & Heat.Core : http://www.crownvic.net/ubbthreads/u...Number=2192486

Blogger fix WITHOUT removing dash (looks tricky but it's nice to know it's possible) : http://www.sparkys-answers.com/2013/...-stuck-on.html

Video of heater core removal from a 99 Crown Victoria that covers a lot of the same steps you'll deal with : http://www.youtube.com/watch?v=l4ternQC5Cs

[Mil1ion]

Hey everyone.

Don't assume the issue is the 12v blend door motor.
After 3 years of hearing about the electric blend door being faulty I just spent $220.00 R & R'ing the motor we found out it ISN'T the motor.
After testing it we determined the motor was either not receiving power to one side nor both.

We then focused on the only part that performs that task.
The ATC header part.
It sends power to each circuit depending on temp required.
This part doesnt supply power to the motor. .not allowing the temp to change.

Before being convinced like I was that the motor was bad. Test the header wires for either the purple wire or Yellow/white wire is getting power when moving the temp slider switch.


I just did this yesterday so now I have to find a replacement

Just thought I would share.

[VicCrownVic]

Hey Mil1ion, I have almost zero experience with any panther newer than a box, but based on another thread, www.grandmarq.net/vb/showthread.php?49603-ETAC-Blend-Door-Reset, what you say makes sense (that the BDA could possibly not be the issue but the control head may be the issue).
According to the first post of that thread a scantool can be used to do a reset, but it sounds like the self test mentioned in posts 7 & 8 is probably the manual method of accomplishing the same thing.
Perhaps trying that self test/reset before looking for a replacement control head might work.
However, if you do not have EATC, then it sounds like replacement control head is your only option based on the troubleshooting results you shared.

Gabriel, since you do not have EATC (you mentioned that you have analog controls) it sounds like the self test/reset probably will not help you.

Edit: Mil1ion, sounds like you do not have EATC since you mentioned "moving the temp slider switch", so the self test/reset I don't think applies (not an electronic/computerized control head). I guess my rambling can be ignored then.