No A/C, digital readout won't stay on AUTO.
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 3 of 3
Electrical Technical Information Discussion, No A/C, digital readout won't stay on AUTO. in Item Specific Cadillac Discussion; This is for an '89 Deville. Recently the air conditioner seems to have stopped working. There should still be freon ...
  1. #1
    Dulce-Joy is offline Cadillac Owners Member
    Automobile(s): '89 Deville
    Join Date
    Jul 2011
    Posts
    1

    Question No A/C, digital readout won't stay on AUTO.

    This is for an '89 Deville. Recently the air conditioner seems to have stopped working. There should still be freon in it. When the button for AUTO is pushed it changes to AUTO for something like half a second and then flips right back over to ECON. Any ideas a semi-amatuer? Thank you.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Wendy-J is offline Cadillac Owners Member
    Automobile(s): 1993 Cadillac Sedan DeVille
    Join Date
    Jul 2011
    Location
    Somewhere in the ether
    Posts
    53

    Re: No A/C, digital readout won't stay on AUTO.

    What things should be and what they are often cause many a headache. It sounds like you had the A/C switched on before turning the key to start the car, all while you had an insufficient charge in the system. Read insufficient as not full.

    If the A/C unit read a low system pressure and moved to kick out the compressor, that's the SECOND symptom you should get. The first is your Check Air Conditioning light. If it stays on for more than five seconds when starting the car, it's a probability. It's a feature to save your compressor when you don't have a sufficient charge. Check your diagnostic codes to verify it.

    Clearing the codes will get the A/C compressor functioning again, but that's not to say it won't happen again if the charge is low.

    Wendy.

  4. #3
    Wendy-J is offline Cadillac Owners Member
    Automobile(s): 1993 Cadillac Sedan DeVille
    Join Date
    Jul 2011
    Location
    Somewhere in the ether
    Posts
    53

    Re: No A/C, digital readout won't stay on AUTO.

    If your mechanic is not used to working with Cadillacs, you may well need to learn how to clear the trouble codes, then teach your mechanic how to read and clear them. I know I did and he's one of the most highly regarded wrenches in the area. He just doesn't see a lot of Caddies.

    If you have a low charge when cranking the engine and the A/C is ON, the computer will see it as NO charge.

    The System will kick out for all sorts of reasons. Too high a charge is one of them. Malfunctioning high and low pressure switches, clutch relay.... There are many reasons. The charge is only one of them, albeit one of the most common. The end result is that AUTO ceases to be an option with your climate control.

    Read, record and clear the ODBI diagnostic codes. You'll see the sticky at the top of this section. Follow the directions there. With my '93, you read the codes where the fuel gauge is, not on the climate control. Had me scratching my head before I realised I had to work on one side of the column and read on the other. A code of .7.0 means ready for instructions. F47 is a low refrigerant warning.

    Wendy.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting