ac worked one sec, next, nothing....

I have a 95 gt, 68,000 miles. Air worked fine, went into a restaurant, came out about an hour later, air doesnt work. Checked freon level and replaced the pressure sensor that sits on the receiver/dryer. Compressor still isnt coming on. Any suggestions of stuff to check? Can the clutch just go out like that? It wasnt making any noises, was ice cold.

Checked the fuse?

i dont have an owners manual or haynes, so Im not sure which one it is. I would assume its a 20 amp, and ive checked all them....does any1 know which fuse is the ac clutch?? thx

i found a diagram online og a 94 gt, it was a 30 amp fuse. It was fine. Any other suggestions? Thx again!

Is the compressor kicking on at all?

no. I turn it to max or norm, all the way cold, and the compressor never turns on. Just blows hot air. I can turn the clutch by hand with a little effort.

If your low or out of refridgerant then the compressor clutch will not engage. How did you go about checking the level or refridgerant in the system?

I didnt have a gauge, so I bought a can and I hooked it up to a hose and plugged it into the low side. Turned air on max, never took any of it.

Thats not the proper way to charge or check the system. Itf its empty, you need to charge with the first two cans upside down, and the third one, rightside up. Is 95 R12 or was it 134A by then.

My '94 is R134A, so his should be too. Esp. if he bought a can....

Anyway, if the system is empty it needs more than a charge. You may have a leak somewhere. Best to have a vacuum pump draw done, and make sure there are no leaks, then refill the system properly.

its 134. Ive filled my thunderbird this way when it had a leak and it worked fine. Im not saying its the right way, just that it worked before. So do I have to go and pay some1 $50 or so just to tell me if its leaking or do I have any more options? It does have a sticker on it where dye was added in 2003. Will a normal black light pick the die up, if any is still in the system that is.

I guess i need to go and buy a gauge to see if it even has a charge?? I know wal mart has one for about 10-15 bucks, i'll use it again in future im sure, so not a waste.

Thx for all of ya'lls patience. I bought a gauge. It showed 70 lbs, which was just in the red zone on the gauge, which meant warning, lol. Can I purge the excess or is that a bad idea? Do ac systems sometimes have pressure build up, or what? thx!!!!!

Seems like its overcharged. You can purge it out, 134 is supposed to be Ozone friendly, but the proper way is to have it evac'ed.

what would have caused it to become overcharged? Or does it just occasionally happen? It had stopped working before I tried to add some.

You know what, now that I think about it. If the compressor clutch is not working or engaging, the reading of pressure will not be accurate and read way too high.

So it could still be low on refridgerant, you really need to find out if there is a leak somewhere and go from there.

alright, thx. Its prob way too low now then, since it reads in the blue on the gauge now, but clutch still isnt engaging. I'll just throw the towel in and have some1 look at it. I'll let ya know what I find out.

by the way, would a reg black light pick up the die?

Should be able to see the die w/out any special light. Should be a yellowish color which can be seen in plain daylight.

when i was letting some out, i noticed it was greenish, so im guessing thats the dye. I didnt see any anywhere on the lines or dryer or anything. i'll keep looking until i get a chance to take it in.

Finally fixed this one as well. It took it getting hot again (gulf coast) to make me get out there and fix it. Turns out it was the Multi-Function Relay that went out. It controls the fan, fuel pump, compressor, I think a couple more as well. Anyways, it was controling everything but the compressor. Got one in a junkyard for $10, air is nice and cold! Thx for your help!!