99 Deville, mice in the heat vents...

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 99 Deville, mice in the heat vents... in Past Cadillac Vehicle Discussion; This car is quite the project... 70,000 miles, rust free Ontario car, Galaxy silver (?), engine is back in and ...
  1. #1
    ponyboyt is offline Cadillac Owners Enthusiast
    Automobile(s): 97, 97, RIP 98, 99 STS with Jakes studs
    Join Date
    Apr 2009
    Ontario, Canada

    99 Deville, mice in the heat vents...

    This car is quite the project... 70,000 miles, rust free Ontario car, Galaxy silver (?), engine is back in and runs beautiful! (studs)

    I had no idea what other work it was going to need... pretty much replaced everything underneath. I've done a few STS's with much higher miles that did not need nearly this much work.

    Anyhow, i have a heating issue. Ive tested as many different ways to blow air as i can think of to try and narrow it down. Ive looked at the diagrams, but i dont know what door is for what, so here goes:

    Heat on max, air comes out the bottom but it is very weak. Can hardly feel any hot air blowing. If i turn it down far enough to make it switch to the upper vents, and i leave the passenger side to hot, it blows hot air out the two passenger vents and cold air out the 2 drivers side vents, air blows hard out all 4 vents. Set to defrost, again it is weak, hardly any air comes out of the dash vent, and not very hot.

    I have history codes, but dont know which are relevant? Im assuming they will be the ACM codes. I do hear clicking when the doors try to move. Not a steady click click clik click, but a click, a 2 second pause, 2 clicks, 1 second pause, a click, and so on, kind of random.

    Oh and the first time i turned it on, the dash vents blew hard and it blue little peices of dark foam all over the place...all over the seats. made me think of a mouse nest :P

    I dont have any Deville parts laying around, but i have a pair of 97 sevilles that all this stuff works in both cars. Would the parts be the same?

    Also, drivers seat heater does not work. First the relay wasnt clicking, i changed it and now it clicks, but still no heat. Passenger is fine.

    Will post codes soon as wife gets back from dropping the kids off

  2. Remove Advertisements

  3. #2
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
    Automobile(s): 2003 DHS - two-2002 DHS's, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
    Join Date
    Feb 2004

    Re: 99 Deville, mice in the heat vents...

    sounds to me that the MODE DOOR actuator is stripped -

    that clicking sound is from the broken plastic gear teeth -

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts