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Discussion Starter #1
AC compressor runs and is charged, I only get warm air out of vents.
Plumbing from compressor to fire wall does get cold
All functions work regarding venting such as defroster, passenger and driver vents, floor vents.
Climate control does work regarding heat, but will not cool.
I had O'Reilly Auto Parts check the car with their scanner, no codes regarding AC.
What should I look into?
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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The auto store scanners will usually only detect PCM codes. Use your cars onboard diagnostics to check the Body codes. Sounds like you may have a malfunctioning air mix door.



Plumbing from compressor to fire wall does get cold
How about the return line from the firewall. Both pipes should be equally cold.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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YUP - as Ranger already suggested -
use the built-in scanner and check for codes -
it is MUCH better than the hand-held units -

IF BOTH of the AC lines going through the firewall are EQUALLY COLD - really - REALLY COLD -
the problem MIGHT be the cabin temperature sensor is sending erroneous information to the computer -

there is a 1" square grill to the RIGHT of the steering column - befind this grill is the sensor -

the sensor consists of a "thermistor" - a temperature sensitive chip - and a tiny squirrel-cage fan -
the fan draws cabin air past the thermistor -
over time dirt/dust collects on the thermistor - actually insulating it from the actual air temp -
ALSO - dirt/dust collects in the squirrel cage fan - dramatically reduces the airflow -

to inspect/clean the sensor you'll need a can of compressed air - a tweezers - and a flat-blade screwdriver -
slowly - carefully pry the grill off - starting from the RIGHT SIDE -
with the grill removed - use the tweezers to pull the crap off the thermistor -
put the little hose on the can of compressed air - and blow the crap out of the fan -

NOTE - if using "shop-air" rather than a can of compressed air -
BE CAREFUL not to use too much air pressure -
you CAN over-speed the blower motor and destroy it -
 

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Discussion Starter #4
Only 1 line going through the firewall is cold.
I did check and clean the thermistor, it wasn't bad. (no change)
Here are the codes I documented yesterday
ABS-4714, AMP-7426, DDM-7368,DDS-9208, DIM-4439, IPC-005F, IPM-056,IRC-0806, LRD-7369, PDM-7368,
RCC-7287, RFA-5952, RIM-2833, RRD-7369, and VDT-6469.
I have not cleared the codes yet.

Thanks everyone for taking the time on helping me out!
Dan
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,694 Posts
Only 1 line going through the firewall is cold.
I did check and clean the thermistor, it wasn't bad. (no change)
Here are the codes I documented yesterday
ABS-4714, AMP-7426, DDM-7368,DDS-9208, DIM-4439, IPC-005F, IPM-056,IRC-0806, LRD-7369, PDM-7368,
RCC-7287, RFA-5952, RIM-2833, RRD-7369, and VDT-6469.
I have not cleared the codes yet.

Thanks everyone for taking the time on helping me out!
Dan
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Only 1 line going through the firewall is cold.
I agree with Ranger - you are low on refrigerant -

Here are the codes I documented yesterday
I have no idea what those are - or where you got them from -
but - they are NOT DTC's -
DTC's - codes - consist of a letter - B - C - P - U - followed by 4 digits -

also -
codes are meaningless without their DEFINITIONS -
there are THOUSANDS of them and no one has them all memorized -

go here for the best list of Cadillac code definitions -

also include whether the codes are C-Current or H-History -
 

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Discussion Starter #7
Thanks everyone, I will get back into this when I have more time this weekend.
I will post what I find.
 
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