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An AC compressor will only engage when the "low side" refrigerant pressure sensor detect that it is above a specific PSI level. A faulty sensor or more likely a low refrigerant pressure will prevent the compressor clutch from engaging.
There are quite a few other conditions that can result in an inoperable compressor as well:
Faulty clutch
Faulty relay
Blown fuse
bad connector
Damaged wire
Faulty controls on the dashboard...
To properly diagnose the problem will require the assistance of someone who can investigate the AC system.
What else can I help you with?
Is the ac compressor on Saturn sl1 bad?
How can I know with no more information than this? Seek out professional help.
Rerouting the serpentine belt on Saturn SL1 to bypass AC compressor?
I have a95 sl1 saturn with a bad ac compress that rattles and want torerout the serpentine belt off the compress. What is the typical cost and is it worth it?
You fixed the clutch on a 2002 Saturn SL1 Now it wont go into gear why?
How long after you had it fixed
Where is the starter relay on a 97 Saturn sl1?
either the kick panel or on the starter itself. sometimes ther are 2 of them
Free electrical wiring diagram 1995 Saturn sl1?
fan does not kick on . when wired direct, it comes on. could it be the sensor?
Why wont your 1997 Saturn SL1 start It turns over but dosent fire Its not the coil or switch?
crank sensor is bad
Can a 1999 Saturn SL1 rear passenger side door be used on a 1997 Saturn SL1?
yes
How do you remove the headlight to replace the bulbs on a 2000 Saturn sl1?
How can I replace the headlamp on a 2000 Saturn SL1
1996 Saturn sl1 that wont shift the shifter is loose and wont engagehow do fix it?
I have this same problem. A broken shifter box. I will repost a fix as soon asap.
What causes the 7.5 fuse for the AC to go out on a 1992 Saturn SL1 it did this 4 times already?
Bad clutch on compressor, unplug the wires from the AC compressor, replace fuse if doesnt blow fuse its in compressor, if blows then gounded wire
Where is the passenger side kick panel on a 1995 Saturn SL1?
The passenger side kick panel is the panel on the passenger's right side that covers the "wall" under the glove box and just forward of the door.
Where is the low ac port for a 2001 Saturn sl1?
The AC compressor on most SL vehicles is on the passenger side, just in front of the engine. Both the high and low ports are connected to the aluminum tubes that connect to the compressor.
