Question about 1991 Cadillac DeVille

1 Answer

The service air conditioner light on our 1991 Cadillac sedan deville 4.9 comes on when I turn the air conditioner on. The electronic climate control will not let me turn on the heat or the ac. It just defaults to economy. The ac at this point no longer blows cold air. I push the off button and eventually the light goes out. Do you have any thoughts on what may be causing this? Thank you for your help in advance. Sincerely, Chris

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 69 Answers

Prob a low charge easy to do get R134a from parts store with hose start with about half a can and check it make sure ac is on max when you charge it light should go off

Posted on Oct 02, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do i turn on my climate control


Climate control is turned on by pressing the 'auto/econ' button.
There will be a temperature control for it that lights up on the right hand side of console display. One can also control the fan speed there or leave it on 'auto'

Sep 01, 2010 | 1989 Cadillac Sedan DeVille

1 Answer

I have a 1996 Cadillac Sedan DeVille. This spring...


If the a/c does not engage as a result of the electronic control system in your 1996 Cadillac, the climate control system may need to be replaced.

However, if the problem is being caused by low charge of R134a in the system, have the system charged before changing that electronic part.

I have never seen a Cadillac Climate Control System do this, which leads me to believe that it may be more electronic than refrigerant pressure related.

If the refrigerant pressure was low in the system, the climate control system should still stay on 'auto' mode, I think, and simply blow warm air.

May 19, 2010 | 1996 Cadillac DeVille

1 Answer

What are error codes E98 and F47 for 1992 Cadillac Deville


The E98 is P/N to D/R In ISC (Idel Speed Control) Range problem. This code will not trigger a service light.
The F47 is Refrigerent System Problem. This code turns on the Service Air Cond light, and switched the Climate Control from Auto to Economy.

Mar 01, 2010 | 1992 Cadillac DeVille

1 Answer

When i turn on the cliamte control the 'service air conditioner' light comes on


the pressure switch is getting a low reading. change the seals on the compressor,and get it re charged.

Jan 10, 2010 | 1991 Cadillac DeVille

1 Answer

Replacing a 1991 cadillac sedan deville air compressor


The lines should be differant sizes.. Did you check it? Ther should be a diagram on the cover over your radiator showing you the set up.. Hope this helps..

Aug 26, 2009 | 1991 Cadillac DeVille

1 Answer

88 cadillac deville, ac blower fan wont shut off, even when car is turned off and key removed. I tried disconnecting the battery to reset the system but it still runs when battery reconnected. Also, car...


Ralph,
Most common cause of this is the blower fan (proper name for the fan you refer to) continuing to run is a shorted out Electronic Climate Control Module. This solid state device replaces the older style fan speed resistor block (at about 4 times the price) This unit is found on the top of the HVAC box under the hood. (HVAC means heating, ventilation and air conditioning) The HVAC box is found on the passenger side of the firewall. Look behind the A/C's accumulator. It will have an electrical wiring plug on top of it. It will be fastened to the HVAC box with a few 7mm hex head screws. Very easy to change.
FYI, do yourself a favor and replace the blower fan motor at the same time. The Electronic Climate Control Module usually fails because the motor is drawing to many amps of current. This is because it's bushings are worn out or the brushes are worn out.
This is very common on Cadillacs and Buicks.
Charlie
PS Not sure why car won't start. Either you drained the battery or blew a fuse which controls starting the engine. Need more info regarding the "no start" condition.

Jun 14, 2009 | 1988 Cadillac Sedan DeVille

1 Answer

Dont know how to turn my air conditioner on in my.I


Your car has climate control. If the Ac isn't turning on at all, it's most likely low on refrigerant (R-134A). Below is a link on how to check/fill AC systems with refrigerant. Otherwise, the car should be serviced by a qualified AC shop. Hope this answers your question. All the best!
Greg
http://www.cyberbright.com/autobin/air_conditioning.htm

Jun 03, 2009 | 1995 Cadillac DeVille

1 Answer

Fuel Data Center and Electronic Climate Control not funtioning


This is defenetly the BCM, I had a 1990 with all of the same problems. Buy a rebuilt and install it behind the clove box. Remember that you must install you memory prom into the new unit as they don't come with any in them (it is what is memorizing your miles driven.) You will get off pretty easy on this one as they are available and not too expensive.

Jan 13, 2009 | 1989 Cadillac Sedan DeVille

1 Answer

Electrical Problem with 90' Cadillac Sedan Deville


the climate control is intergrated through the pcm and ecm i would advise you to take the vehicle to the service shop they have a diagnostic scanner that will access the ecm and either clear a code that prevents the climate control from working or find a more severe problem that requires you to replace the hole unit. please rate this solution. thank you and good luck.

Aug 29, 2008 | 1990 Cadillac Deville

Not finding what you are looking for?
1991 Cadillac DeVille Logo

692 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

75744 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8123 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...