Originally Posted by Tungstn-IS

If the a/c compressor isn't kicking on it is usually due to the pressure sensor, or being too low on refrigerant. It will kill the compressor to run it dry, so the pressure sensor will only allow it to kick on if it the pressure is within the required tolerance. So if the sensor is dead or the pressure seeped out, it will not cycle. Have you popped the hood and physically looked to see if it's coming on? It's in the lower right corner of the engine when facing the engine bay.

It's really hard to say what could be wrong with it without hooking up a manifold to the system and testing the sensor.

Originally Posted by flynryan

With that being said, couldnt he just get a can of refrigerant and shoot it into the system? If the system is low and the sensor isnt letting it cycle maybe this will enable it to work. The cost if probably $30 or so. Probably the cheapest potential fix he could do.