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2003 Deville base
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258 Posts
Discussion Starter #1
so I ?recently just tried my AC for the first time since winter and noticed when I turn it on I hear like a screeching door trying to open and the AC blows freezing cold on the passenger side of the car but blows warm on the drivers side is this some sort of actuator door or something and if so how is this Fixed
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,783 Posts
Re: 2003 cadillac deville ac problem

Could be an actuator. If so, you should have a B (body) code. Might try exercising the temp control door by running the temp from MIN to MAX and back a few times.
 

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2003 Deville base
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258 Posts
Discussion Starter #3
I haven't got a code yet but I will try exercising the door where is it located if I do need to replace it
 

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2003 Deville base
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258 Posts
Discussion Starter #5
great idea I left the AC on full blast and switch to Heat and then back to AC a couple times and now it works thanks a lot
 

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2003 Deville base
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258 Posts
Discussion Starter #6
So my ac went back to blowing warm out the drivers side vents and cold air out the passage side I think I may need to replace the door or something?anyone know what part I need and where it's located to replace it?2003 cadillac deville.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
Joined
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19,270 Posts
Re: 2003 Deville ac problem

So my ac went back to blowing warm out the drivers side vents and cold air out the passage side I think I may need to replace the door or something?anyone know what part I need and where it's located to replace it?2003 cadillac deville.
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FIRST - you need to DIAGNOSE the problem -

throwing random parts at a problem rarely solves it -
and is the most expensive method of repair -

you can try "exercising" all the doors -
just to be sure one isn't sticking -

set the fan to a low/medium setting -
so you can feel the air movement -
but also hear the air doors moving -

slowly change the MODE selector to each position -
floor - center - defrost - several times -

them leave the MODE to the center vents -
so you can feel the air temp easily -

turn the passenger side control off -

turn the heat to 90* - slowly -
wait a minute -
then turn the temp down to 60*-
do this SEVERAL TIMES -

now you are ready to test the system -

use a thermometer to actually measure - and compare -
the air temps - left/center and right center vents -
they should be the same -

turn the temp up to 90* -
measure the temperatures - post the results -

turn the temp to 60* -
measure the temperatures - post the results -

now turn the passenger side temp control on -
you should get up to 5* hotter or colder than the "main" setting -

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check for codes -

ALL the actuators are monitored -
and if they are failing -
a code would be set -

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if there are no codes -
and a noticeable difference in AC temps -
with the temp set to 60* -

put a real set of AC gauges on the system -
and post BOTH the high side and low side pressures -

typically the freon is just low enough to cause this symptom -
but not low enough to set a low freon code -
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,783 Posts
Re: 2003 Deville ac problem

Warm on the drivers side and cold on the passengers side is a symptom of low refrigerant (usually not quit low enough to trip the LOW REFRIGERANT message or set a DTC). Chances are, you just need a top off.
 

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Registered
2003 Deville base
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258 Posts
Discussion Starter #9
I did have a while back a green liquid that puddled up under my car one time it wasn't a large amount but I thought maybe it was from the AC.it looks like there is a pinhole leak in a pipe underneath that I believe goes to the AC that was slowly dripping green fluid
 

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98 DeVille, 97 DeVille d'Elegance
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Freon doesn't drip green from a pipe... That more than likely a cooling system leak and has nothing to do with your AC issues.
 

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2003 Deville base
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258 Posts
Discussion Starter #12
I suspected coolant as well but I've never had a problem with coolant being low and I traced the pipe that was leaking at I think it goes to the ac?
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
Joined
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19,270 Posts
Re: 2003 Deville ac problem

I suspected coolant as well but I've never had a problem with coolant being low and I traced the pipe that was leaking at I think it goes to the ac?
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I seriously doubt the green liquid has anything to do with AC -
you have a coolant leak -

the only AC plumbing located below the top of the engine -
are the lines at the compressor -

you have a coolant leak -
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
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86,783 Posts
Re: 2003 Deville ac problem

The only "green puddle" you could possibly get from the A/C system would be oil with a dye in it, but that would not be a lot. How big of a puddle are we talking about and where did you find it?
Did it look more like oil or coolant?
Do you have orange Dex in the car or green coolant?
 

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Registered
2003 Deville base
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258 Posts
Discussion Starter #18
having trouble loading the image I'll keep trying is there anything I can put on the line to cover the hole or does it have to be replace
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
The image is displaying for me.

If there's a hole, it needs to be replaced.
 
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