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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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#3 of 57 Re: A/c and Heater Will Not Blow Air [richville] by davyboy1 Jun 27, 2005 (6:45 pm)
Replying to: richville (Jun 21, 2005 9:50 am) Hey Rich, Like you, I cannot find the fuse either. I can't believe that this motor is not fused. Can't understand why this is a secret. Dave D.
#4 of 57 Re: A/c and Heater Will Not Blow Air [richville] by uzap Jul 01, 2005 (3:44 pm)
Replying to: richville (Jun 21, 2005 9:50 am) I recently purchased a 99 deville that had hot air only from the drivers side vents but cold air from the passenger vents and I found by accident through much research under the dash that an accuator was not functioning. On the passenger side I dropped the panel which is held by about 3 screws that the rod that opens and closes the the flap door to bring in fresh air was stuck in the open position and therefore only hot air would come in on the drivers side vents or defrost or even if switched to the floor. I disconnected the rod just by pulling it out of the plastic socket that holds it and pushed it and pulled it while keeping a hand over the center vents to verify if there was a difference in the temp as 1 is for driver and the other is for passenger and sure enough this was the problem. Since it was 2 a.m. when I found the issue...( I had to wait for the old lady to fall asleep since I purchased the car for her and she did not want me taking anything apart as she had already scheduled an appt with the Cadillac doctor for the following day) I took duct tape and wrapped the rod and pulled it closed and this worked for a couple of days as I took down the accuator and researched GM cars that had this model and saved a few dollars by getting it for a different chevy car. You may check and see if this is the problem. I also noticed that the blower has been changed out as under the hood there is a new metal patch above the blower and I have now read that the blower housing has to be cut out to be replaced. good luck. Replies to this message: jspencer1 (Jul 02, 2005 10:03 am)
#5 of 57 Re: A/c and Heater Will Not Blow Air [uzap] by jspencer1 Jul 02, 2005 (9:03 am)
Replying to: uzap (Jul 01, 2005 4:44 pm) I have a '98 Deville and the blower motor does not have a fuse or relay. If there is no air blowing, the motor is shot. I found one on the net at a used parts place and had a mechanic perform the install. It was relatively easy if you know how to lower the motor which he did from underneath. Removed the housing and placed the new motor. The private mechanic worked at a dealership for 6 years and confirmed there are no fuses.
#6 of 57 1995 Deville--driver side heater blows cool air by tbeb Oct 30, 2005 (7:28 am)
I have a 1995 Deville that I purchased in 2000. The driver side heater has always blown cool air. My mechanic says this is an engineering screw up, and car probably came off the assembly line with this problem. He said General Motors suggested a fix. He told me not to waste my money because this fix doesn't do much good at all. (By the way, my mechanic now has his own business but at one time was a mechanic and then the service manager for a Cadillac dealer.) I've tried a 12 volt 10 amp heater and I found out my breath is warmer than heater's output. I live in Northwest Indiana, and I'd sure like to fix this problem so my feet will stay warm. Thanks. Replies to this message: sarge2003 (Nov 15, 2005 2:46 pm)
#7 of 57 Re: 1995 Deville--driver side heater blows cool air [tbeb] by sarge2003 Nov 15, 2005 (2:46 pm)
Replying to: tbeb (Oct 30, 2005 7:28 am) My passenger side got cold air on my 1995 Deville. It is now fixed. A "door" under the dash was not opening and closing properly.
#8 of 57 Heater fan constantly on by aaronspink Aug 16, 2006 (5:59 pm)
hello, I have a 1993 sedandeville that i recently bought. when i first got it the heater fan didnt work at all then i found that a fuse was missing. I replaced the fuse and the fan wouldnt stop, even if the car was off. No matter what the climate control system said the fan was constantly blowing. Any ideas? thanks aaron Replies to this message: bolivar (Aug 19, 2006 6:51 pm)
#9 of 57 Re: Heater fan constantly on [aaronspink] by bolivar Aug 19, 2006 (6:51 pm)
Replying to: aaronspink (Aug 16, 2006 5:59 pm) Probably the main temperature control box, under the dash, on top of the air box.   Especially if it blows even with the key off.
#10 of 57 Cadillac fan by imidazol97 Aug 20, 2006 (5:54 am)
Later models of leSabres and Park Avenues have a blower control module that sits inside the air path next to the blower motor. The internal controls change that electronic circuit board. One failure mode is that the blower never shuts off. The circuit board locks into continuous circuit mode. Other failures are erratic fan operation with speed changes, no blower, blower coming on later...   Check the power lead from blower motor backk to find the blower control module. Advanced Auto reported has them for 93 and on H bodies at about $100. If you find it's the problem, they may have yours.
#11 of 57 blower moter by millstream Jan 28, 2007 (6:13 pm)
I bought a 2003 deville about 6 months ago. Recently the front fan will work for a few days and then just quit.The fan may not work for a week or two and then it will work again. The back seat fan has always worked great. When I switch between floor, vent, and defrost it sounds like they are switching but still no air comes out. Any information would be appreciated Replies to this message: budcaruso (Dec 06, 2007 8:27 am)
#12 of 57 Blower Control Module? by jgael Feb 17, 2007 (7:49 pm)
I have no problem with heat or AC. I just can't get air to flow through the middle vents on the dash. The floor vents and the defrost vents work fine. My 2000 DeVille makes a ticking noise in the middle of the dash when the car is started. I took the bottom dash panels off of both sides and the noise is definitely closer to the driver side, right behind the radio assembly. The ticking noise lasts for about 15 seconds and then quits (seems like a worm gear gets tired of trying). If the temperature is set to "auto" and I lower the temperature from heat to AC, the control module tries to divert the air flow from the floor to the middle dash vents because I can hear the ticking again...but it just can't grab the gear that shuts the damper (diverter) to change the air flow to the middle vents. However, if I send the air flow to the defrost vents, there is no problem. So, is this the blower control module, or is the BCM working fine and it's a problem in some other actuator down the line to moving the damper/diverter in the vent system? Replies to this message: daleorjayne (Mar 21, 2007 6:04 pm)

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