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Dragon Fire Posted on Jan 04, 2019
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Hello, i have a 94 Cadillac DeVille and my AC/heater doesn't come on. When i turn the ignition on the climat control reading reads nothing but two lines. When i checked the code it read No ACP data. What do i need to buy to fix this? Please help... Thanks.

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Jeff Armer

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  • Cadillac Master 3,418 Answers
  • Posted on Jan 04, 2019
Jeff Armer
Cadillac Master
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Joined: Oct 21, 2018
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You don't buy anything until a qualified repair shop does the diagnostic's . So do yourself a favor an take it to a qualified repair shop before you buy a bunch of parts the vehicle doesn't need .

5 Related Answers

Anonymous

  • 255 Answers
  • Posted on Jan 04, 2009

SOURCE: 1998 cadillac deville reads service ac system

Hi,check if the compressor clutch is engaging,if not check the conection at the compressor if ok check,fuse ,or relay ,if those are fine and the commpressor is engaging,check freon presure ,may be too high or low, if this is the case ,correct the problem and disconect the negative cable from the battery for a minute to reprogram the sistem..C1

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Monster80

Joe Lamb

  • 463 Answers
  • Posted on Mar 30, 2009

SOURCE: 1986 Cadillac Deville, Fuel Data Center &

If its a digital dash not that this sounds good but smack the dash right in front of the steering wheel a few times and if it clears up or makes it do other things it needs a new instrument cluster.

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

brandon day

  • 173 Answers
  • Posted on Mar 21, 2010

SOURCE: 93 cadillac deville digital read out not working right

sounds like a short.

duane_wong

Duane Wong

  • 6826 Answers
  • Posted on Jun 30, 2010

SOURCE: my 1999 Cadillac Deville will not turn from econ

charge the system with a few cans of r134a.

Anonymous

  • 1340 Answers
  • Posted on Oct 28, 2010

SOURCE: On a 2003 Cadillac Deville,

Do you mean the backlighting for the buttons,or the digital readout,or both?If it is the backlighting,it should be just a bulb.It depends on a couple things of how easy it will be to replace the bulb.Where it is located,how the dashboard is built,and how much you know about access to the dash.It should be somewhat easy to get at since these are normally in the center or lower half of the dash and you should not have to take the whole thing out just to replace the bulb.Please let me know completely what is out on that panel.This should noway be just a fuse as it would cause more lights to go out.Greg

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0helpful
1answer

Cadillac deville 89 fuel data center and climate control arent working.

Hello Belinda Reid,

Nice car...
(sorry... I'm sure you are not in the mood right now)...

There are CADILLAC Clubs across this country
(lovers, admirers, professionals & amateurs)...

I recommend for future issues you seriously consider
looking into joining... The wealth of information is
really quite EXCELLENT... or buying your own set of
FACTORY WORKSHOP REPAIR MANUALS.

For these issues... (I doubt they are related)
Starting with a GREAT CIRCUIT DIAGRAM
would be the best approach...

I PREFER PROFESSIONAL GRADE FACTORY
repair manuals ... but FREE circuit drawings & your 22 TECHNICAL Service Bulletins (TSBs) can be found
on BBB Industries website
(registration is required... these are real documents)
BBB Industries Premium Alternators Starters Power Steering Products

In the 1989 Deville (an issue shared issue w/Eldorado) ...
I did find a TSB on "BLANK DISPLAY" ... Ironically the
TSB page was also blank (GM humor ..
(I presume)).

The FUEL GAGE seems to be a popular part...
(typically means "unreliable: great point to START").

On eBay (refurbished (1 year warranty)
OEM 1985 1993 CADILLAC DEVILLE FLEETWOOD FUEL DATA CONTROL DISPLAY 1YR...

Rockauto (out of stock (I rest my case))
http://www.rockauto.com/en/catalog/cadillac,1989,deville,4.5l+273cid+v8,1025693,fuel+&+air,fuel+display+control+module,10492

Extra information
More Information for BLUE STREAK ELECTRONICS FDC1

Also see HVAC Controls, Motors & relays
(another OUT of STOCK: popular part)...
http://www.rockauto.com/en/catalog/cadillac,1989,deville,4.5l+273cid+v8,1025693,heat+&+air+conditioning,programmer,19408

Info
More Information for BLUE STREAK ELECTRONICS PRG2

ENTIRE control panels are available on eBay(some good... some NOT-SO-MUCH (but you are protected (sorta)).
85 92 CADILLAC DEVILLE ELECTRONIC CLIMATE HEATER AC CONTROL SWITCH eBay

Dress warm... happy hunting
On the HVAC if the controls seem to be working... another
popular part are in the ACTUATOR DOOR sections of your parts catalogs...

Look through the eBay parts for ideas...
0results for cadillac 1989 deville hvac vac control
AND don't overlook the CONTROL RELAYS that ABOUND in
your vehicle... Buy a few spares BEFORE they become rare.

Hope this helps.

Carnac the Magnificent
0helpful
1answer

My 1998 Deville lost all power to the A/C and Heater

Could be a fuse or the ac control module. I would check the fuse first.
0helpful
1answer

The information center reads "very low freon" and "ac compressor off". this happens whenever you press the auto button on the climate control panel. On the climat control panel when you press the AUTO...

You'll need to have the A/C system serviced. It is low on freon so the compressor isn't coming on, and you won't have any A/C. Usually you'll just need some freon.
1helpful
1answer

Just did a tuneup new wires and plugs how do I

Turn the key on. Hold off and warmer on the climate control until all the lights light up. It will now read out all the codes in all the computers. Let it go until it reads (PCM?). Now push up on the blower speed. It will read PCM DATA. Now push down (I think 3 times) until it reads CLEAR CODES. Now push up on the blower speed. It should read PCM CODES CLEARED. Now turn the key off.
1helpful
1answer

'96 cadillac deville has no air.cond./heat

Unfortunately for you ( i had the same problem) The A/C compressor HAS to be in working order on these cars or else all heck breaks out with the climate control.

If it's a nice car, get a new compressor installed. If it's borderline- get rid of the car.

I paid 2200 to Cadillac to fix the A/C and climate control only to have the transmission fail in my '93.

I dumped the car soon thereafter....
0helpful
3answers

Just brought used 94 cadillac deville ac works great but no heat

This is the the Cadillac Climate Control operates. When you press AUTO, the system will automatically maitain DESIRED temp . The A/C compressor will operate ALL THE TIME on AUTO. Don't want the a/c compressor to operate, PRESS " ECON". Air delivery will NOT be DE-HUMIFIED, nor will it cool, only warm,. Hope this helps.
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