jje1953

As it turns out, I had a faulty low pressure sensor. Don't know the mechanics of the AC system. but apparently that was the issue. Took it into the mechanic and explained how I couldn't get the recharge done, and they came back and told me the problem was a faulty/leaky sensor. They replaced it and did the recharge and everything appears to be ok (knock on wood!)

So I got the message that I was low on refrigerant and the compressor was shutting down to protect itself. (98 DeVille) Thought I could handle the re-charge myself, but perhaps not! The kit I am using says that I should connect my line (no problem there), start the car, turn the AC on full blast and begin charging. Problem is, the compressor will only run a few seconds, then shut off. The indicated pressure in the system varies greatly as the compressor shuts off and on in very short cycles. I had cleared all the codes before attempting, but to no avail. Is there something wrong with the compressor, or am I just doing this the wrong way? It almost appears I should attempt the re-charge with the car and system turned off, but that's not the way the kit says to do it. Is the "shut off" that the computer went through blocking my attempt to re-charge? Any clues appreciated...