Last post on May 16, 2013 at 6:14 AM
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Cadillac DeVille, Heating / Cooling, Sedan
#6 of 88 1995 Deville--driver side heater blows cool air
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.
#7 of 88 Re: 1995 Deville--driver side heater blows cool air [tbeb]
Nov 15, 2005 (2:46 pm)
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 88 Heater fan constantly on
Aug 16, 2006 (5:59 pm)
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?
#9 of 88 Re: Heater fan constantly on [aaronspink]
Aug 19, 2006 (6:51 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.
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.
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
#12 of 88 Blower Control Module?
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?
#13 of 88 Re: Blower Control Module? [jgael]
Mar 21, 2007 (6:04 pm)
My 2000 Deville had the same problem three weeks ago. The problem was a stripped damper gear. The gear is plastic and very hard to get to. My mechanic had to do quite a bit of work to get at the gear and replace it. That cost me $300. I did not take it to the dealer because it would probably have been more expensive -- they would probably have wanted to replace a bunch of stuff under the dash. Call your dealer and get a cost to replace the vent damper gear -- the one that controls which vent blows air. An independent mechanic might have a hard time, mine said a job that should have taken an hour took three times that long.
#15 of 88 98 Cad deville airconditioning problem
Jun 25, 2007 (4:56 pm)
Have a 1998 Caddy Deville with 115,000 miles. Had water hose replaced and mechanic forgot to refill radiator. Car overheated. Topped with coolant and car sat for about 6 months. Went to turn on heater after sitting for six months only to have extremely cold air blowing. After about 10 minutes of blowing cold air, message center says refrigerant low, airconditioner turning off. Seems the heater core unit was inoperable and was pulling the freon from system. Now both the A/C and Heater don't work. Had the car in to the mechanic 3 times and they keep trying to replace A/C seals. Does the heater core and A/C operate off the same system. Right now I just want the darn A/C to work!!!