Hey Judy==The problem can be in the relay, motor or control pannel and it will take someone with a good dit of know how torepair it of it is anyhting other than a fuse. Check ALL of the fuses. GoodluckJoeAnswerIf I'm understanding your question, you're only pumping out heat. If that's the case, then there's a mixing chamber (for lack of a better word that's what I'm calling it) under the glove-box. There's a rod that controls a valve in the chamber that determines how much hot and cold air is mixed to create the appropriate temperature inside the car. On mine, the rod became disconnected when I ran over a speed bump to fast. All I had to do was put it back in place and it worked fine. That would be the first thing I'd check.
D@mn shame I didn't find that out until after it got cold again. ;-)
Good luck.AnswerI have a 1996 DeVille that just had this problem. The cause of no air flow from the fan (heat or A/C) was caused by a blower moter failure. The blower moter is located on the firewall behind the engine up at the spark plug wire height. Replacing this motor is expensive and hard to do. But not impossible. It took me 6 hours and a little help from a neighbor. You first need to purchase a new blower motor. It's expensive at about $400. You need to loosen all the engine mounts and pry the motor forward to give clearance to the motor housing. This requires a lot of strength and a good prybar. Use wooden block wedges to hold the motor forward while you work. Remove the old blower motor and insall the new one. (Careful not to damage the squirel cage while installing it or you are back to the parts place to buy a new one.)Connect the motor and test it. Release and remount the engine. AnswerMy 2 cents:
Well I finally got it after many cuts and scrapes on my hands (never loan out your tools) trying the rocking engine and forcefull persuasion method "didn't" work, I finally borrowed a neighbors jack (did I just say something about loaning tools?) dropped the two sub-frame bolts and "presto" went in slicker than vasoline and ......well you get the point.....for me anyway, the subframe was the way to go, could probally do it in less than an hour and a half now. Just to review how I did it:1. Place car on car ramps for easy access to subframe.2. Disconnect battery3. Remove coil pack,last 2 spark pug wires closest to the blower(cover holes with clean cloth),and black vacum assisted module(don't know what it's called but didn't want to break it,held in with one bolt)4. I then removed the 2 ends of the "dogbones" connected to the engine.5. Now place jack under front of subframe and loosen the 2 bolts on both sides about 2 inches, ( no need to completely remove). and allow to lower.6. The old blower has three screws and one plug, should come right out no problem-remove and replace-just don't forget to add the new heat shield like me!Reverse process to put it all back together, don't forget any wire you may have disconnected on coil pack, vacum whatever may have helped you get more room. This is just what I did for a "99" DeVille. Your results may vary and I know there is similar info in other threads but every little bit helps and like stated in other posts make sure it is the motor 1st.Total Cost: $238.00+ tax (Advance Auto) About 3 hours if you don't know what your doing, and various cuts and scrapes. Good Luck. Bob TAnswerI just replaced mine and it was not too bad. Go to www.rock-auto.com for a A/C Delco replacement. I think mine was $180. You should not have to pry the engine if you do a few simple things first. Remove the strut-to-strut brace that crosses the engine. Then uplug any electrical connectors, including the fan's, that are in the way of the blower motor on the firewall and tuck them down out of the way next to the engine. Look at the firewall just above and all around the blower motor. It should all be made of a rubbery material. Look at the firewall just above the motor and you will see writing that is in raised letters showing a "cut line". This is where you need to cut the rubber firewall material from the motor to the farthest point towards the firewall. I actually removed the bolts from my motor first and let it sort of hang there while I cut this material. After cutting the material, fold it up and you will see a bolt that holds a plastic cover onto the firewall and forms part of the rounded shape above the squirrel cage fan. Remove this bolt and the plastic cover (it's about 3 x 5 inches)and simply lift the motor and fan assembly out. This will take a little doing but it is possible after you find the correct position and hold back the remaining rubber you just cut. Installation is just the reverse.
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