My wife had to get the neighbor to jump off her car the other day. The battery has been an issue lately so I bought a new one that day. when i got home, i immediately changed the battery. when i fired up the engine to test the battery, i noticed that the a/c didnt feel very cool, but didnt run it long enough to think anything of it. later she went to town and said the a/c never worked. long story short, everything seems fine but the a/c clutch wont engage. i even tried to jump it at the low psi switch. what do you think? i really dont want to have to take it in as i believe it is only a minor issue pertaining to the jump start or the battery replacement. i did get a spark when i installed the battery, but just assumed it was from the under hood light.

 

Take a voltage reading with the car running. You should have about 14V. The alternator might be going out not providing enough power to run the AC.

So, what happened when you jumpered the pressure switch? No clutch engaging? Do you have power at the relay for the compressor?

If you have power at the relay and jumpering pressure switch did not engage clutch, then most likely the ac clutch is shot.

 

FWIW I looked up your vechicle in the towing and roadside service Bible and there are no special precautions relating to jump-starting; that's sometimes a factor especially on newer vehicles.