today my AC started turning on when my car was of. When i turn of the car and dont lock the doors, the AC turns on. When i lock it the ac turns off. But earlier today it was doing the oposite. it was turning on when i locked the doors. The alarm on the car has been actin up lately and i think thats what is causing it. Any ideas/ help?

You mean the fan ???

no i mean the ac.

What are you calling "AC"?

Air conditioning man, cold air coming out of the vents inside the car.

Someone correct me if I am wrong, but the A/C can't run with the car off. Doesn't the serp. belt power the A/C. I think the fan may be coming on and blowing any cold air that is left over out of the vents. Sounds like an electrical problem.

Yeah, I think he must be talking about just the blower fan.

no i mean AC. it blows so cold that i get moisture on the vents and around that area. i dont know maybe the fan is really good.

Originally posted by lsneo:

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no i mean AC. it blows so cold that i get moisture on the vents and around that area. i dont know maybe the fan is really good.

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Sorry but that would be impossible. You may be getting cold air out of the vents but it's just whatever cold is left in the a/c unit. And it won't be cold long, since the engine must turn the compressor to cycle the refrigerant through the a/c unit to remove heat from the air passing over the cooling coils to de-heat (a/c doesn't really make air cold, it removes the heat, it's basically the same thing since it cools the air after it removes the warmth) the air coming out the vents. But without the coolant flowing through the unit, all you'll get is some cold air for a while, a couple minutes at the most, until the a/c gets warm from the ambient air it's drawing in, or from the air inside the car if 'max a/c' is on. So what you're feeling is the heater fan blowing cold air past the cooled a/c unit, not the a/c actually running, since the engine powers it.