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Cadillac DeVille Climate Control

57 messages,  Last post on Sep 27, 2009 at 12:42 AM

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What is this discussion about? Cadillac DeVille, Heating / Cooling, Sedan

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#50 of 57 89 DeVille Blower module by captrfd May 09, 2009 (6:43 am)
Just a note, my blower stopped working. I did the required testing and blower motor replacement was the outcome. Before I bought a new motor I bench tested the motor and it worked fine. The blower control module was the problem. Recommended voltage tests did not reveal problem, so beware before you buy.
#51 of 57 auto/econ not working by tripled1 Jun 06, 2009 (1:35 pm)
Hey, My 96 deville has an issue. When you press the auto/econ button to get it to switch to auto, it will not. It goes right back to econ. This problem seems like it happened over night. Can anyone give us a tip. Thanks in advance. Replies to this message: bolivar (Jun 07, 2009 1:49 am)
#52 of 57 Re: auto/econ not working [tripled1] by bolivar Jun 07, 2009 (1:49 am)
Replying to: tripled1 (Jun 06, 2009 1:35 pm) Econ means the AC compressor is switched off. Auto means the AC system is switched on.   You have a problem with the AC. One of the high or low pressure sensors detects a problem, and will not let the Auto mode be set.   Fix the AC.
#53 of 57 95 caddy sedan deville AC trouble by korrupt1 Jun 07, 2009 (4:41 pm)
Like its anything new....but I am new to the car and when I got it yesterday you could feel cold air coming from the vents but NOT blowing....then on way home it said "refrigerant low.....ac compressor off" I am assuming that means it shuts the compressor OFF to keep it from being damaged?   also when you press on the fan speed selector...I get nothing.   I tried to add refrigerant but since the system wont kick on it wont cycle to get refrigerant flowing thru it.   HELP!!! Its HOT in AZ and I need this sytem to work as soon as possible.   The rest I can deal with and work on with some leisure...but the switch, the blower and the AC not working...is just frustrating me   thanks a million for help.   BTW...new here but real used to working on MOST cars but this is the first caddy I have ever had so any help be real appreciated Replies to this message: bolivar (Jun 08, 2009 12:55 am)
#54 of 57 Re: 95 caddy sedan deville AC trouble [korrupt1] by bolivar Jun 08, 2009 (12:55 am)
Replying to: korrupt1 (Jun 07, 2009 4:41 pm) Yes, if the sensors see high/low pressure, it will not allow the compressor to turn on.   If you could find the places on the internet giving you instructions, you can display and reset the error codes from the buttons on the dash.   If you can't do this, you call pull the negative battery cable for a minute and this will reset the error codes. Then, have your freon hoses all hooked up before you restart the car, and you might be able to turn the AC system on and suck in enough freon before it resets the code. Might have to do this a couple of times to get enough freon in to stop setting the codes. Of course, this assumes you only have a leak and the rest of the AC system works ok.   No idea about the fan.
#55 of 57 93 caddy deville climate control and fuel data gauge show a "c" only on by fveaces1 Sep 02, 2009 (11:04 pm)
1993 cadillac devile 4.9 liter climate control and fuel data only shows a "c" on the displays. I've check the BCM, clusters, relays, fuses, temp. sensor, replaced alternator and still the same results. The blower moter runs until you turn the key to the off position. The continuous power to the interior when key is turned off no longer works meaning when I turn the key to the off position I loose all power in the car where it normally stays on for 10 minutes. Is there anyone out there who may have had this problem with their Cadillac and if so how did you solve this problem?
#56 of 57 help with fan problem in 98 cadillac deville by miamifan Sep 26, 2009 (8:51 am)
My 98 deville seems to have a mind of its own, it sometimes not always will start what appears to be the fan after the car has been shut off for 20-30 mins. It is random I never know when its going to happen. I always shut the air off fully before the care is turned off. funny thing is it sounds like the fan but when you get inside there is not air coming out of the vents. You have to put key in ignition turn it where all dash lights come on etc... then turn off and the fan goes off. what is this??? its scary so far has only happened at home in my garage door is open every time but I wonder if it will happen in the parking lot at work or store whatever car only has 58K miles on it. Help!!!!! Replies to this message: bolivar (Sep 27, 2009 12:42 am)
#57 of 57 Re: help with fan problem in 98 cadillac deville [miamifan] by bolivar Sep 27, 2009 (12:42 am)
Replying to: miamifan (Sep 26, 2009 8:51 am) There are a couple of possibilities, and I don't remember if either or neither are common to your 98.   -The connector that feeds power to the fan fails. It doesn't make good contact or something, overheats, and basically somewhat melts. This contact is under the hood, near the firewall, on the passenger side.   -On some years, the controller module that controls the fan speed fails in a certain way. When it fails, it will turn the fan on, even if the ignition is totally turned off. This module is inside, behind the glove compartment, on top of the air box.

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