Did you use a vacuum pump and remove all the air/moisture before you recharged it?

Are you sure that you are adding the correct amount of Freon? Also what type of Freon are you using, some of the aftermarket stuff is actually quite harmful, im pretty sure you need to be adding 134a freon but an expert can correct me.

Adding too much refregiant can cause too much pressure thus causing the compressor to "boom". Hopefully this helps

The valve it self blew out or the entire fitting blew off? If just the valve blew out you can just replace that and be done with it. The fitting itself should be replaceable as well. However if it BLEW off your going to want to bring it to a professional. You lost oil from your system as well which is critical to the life of your system. But shop around for sure, if your going to scammed on anything, it's a/c work!

you might have a clogged orifice

If the a/c was working well and didn't seem to cycle on and off before it blew, I doubt it was over charged. If the pressure gets to high the compressor will cycle off to relieve the pressure, although driving it like that might cause something to blow I'd imagine but i've never run an over charged system.

a proper charge procedure is critical, if it was done correctly prior to the first blow off, i would suspect its compressor time. its important to change the receiver/dryer and orifice tube with any compressor replacement. and used parts are a huge gamble when it comes to a/c.

I didn't recharged it myself, I went to ac mechanic to do it, because i dont know how to, and he vacuumed it and everything, and the second time I went to a different mechanic, so I doubt they overcharged it at both places.

What blew up was the top of the high pressure valve, the valve was still on the compressor but the top was gone, and like I said I changed it with another valve which I took from an used compressor( but still in pretty good shape), and the same thing happen a second time.

And what do you mean by: if it was cycling on and off... it was working, blowing cold, but I dont really know about this, it felt like its turning on and off at times, but it was always blowing cold.... so I thought this is normal, and is it possible they overcharged it at both places that I went? Lol

unless the mechanic was a straight up moron, it's almost impossible to overcharge a system at a shop with the equipment they have. So this is your cap that blew off? (red cap probably) if thats the case your schrader valve could just be loose and built up pressure (since the cap has an o-ring, because minor leaks are not all that uncommon at the valve) and blew it off then leaked down until it was empty. If that is the case then it's a real simple fix that won't cost you much more than just backing down the system and having it re-filled. If you are still unsure, take a picture and edit it in "paint" or something to show EXACTLY what you are talking about. It seems very simple though.

what i was talking about as far as cycling on and off is:

If your a/c system is over charged and is creating too much pressure, your compressor will turn (cycle) off, and when that happens you'd probably notice a slight change in temp as long as you have your a/c crankin. As soon as the pressures fall and return to a safe range, the compressor cycles back on. The same thing will also happen if your system is low on freon.

bring it back to the last guy that worked on it and tell him your valve leaked and he'll probably fix it for free or at least give you a discount i'd image.


Not sure if you have any LKQ's in your area or not, or if they'd even still have any a/c compressors in stock for a 95, but you can buy one from them and bring it to the shop and they will normally leak test them for you. Atleast the one that i worked at did.

hope this helps, let me know

Here is a photo i took of the first valve that blew up, the second one is on the compressor and looks exactly the same, with no top.
<a href="http://s487.photobucket.com/albums/rr231/ponkata/?action=view&current=DSC00109.jpg" target="_blank"><img src="http://i487.photobucket.com/albums/rr231/ponkata/DSC00109.jpg" border="0" alt="Photobucket"></a>

the first time the top of the valve blew up, all the freon leaked just for maybe 10 sec

I cannot refill the system with the valve in this condition, because it will not hold pressure. so high pressure valve definitely has to be changed, but I think the next one I put, even if its new, its gonna blow like the last 2 valves.

For me its easiest to change the compressor with a new one and dont deal with this ever again, but im scared that Im gonna blow up the valve on the new compressor.

I also dont know what a schrader valve is...

the schrader valve is the whole unit, the valve core is what screws in to the center, same as a tire valve, if the system is over pressuring, and destroying valves, check to see if the reciever dryer (cylinder shaped unit behind front bumper on pass side next to condenser) is plugged, as this is where your ac system monitors pressure. aka, dryer plugged, high side pressure retards, low side runs dry. could be your problem could not be, but its a simple fix. also, next time you have it filled, ask them to under charge it and over oil it, run ac max cycle, then redrain and vaccum it. this will help clean the lines, condeser, etc. oh and cycling is just the compressor clutch engaging/dissengaging to keep pressure in check

taboo4 said:

LoL. I need some AC Expert Help!!!

I recharged my ac and everything seemed fine, but one hot day when I was driving my car the high pressure valve (the one that is on the ac compressor) blew up and all the freon went in the air.

I have no idea what could cause this to happen!

I don't really know how to change a compressor, I bought used compressor in a very good shape and just changed the high pressure valve, charged the ac with freon, and after less than a day BUM!!! the same thing, the valve blew up. My thought is probably the compressor is broken, but then again I don't know much about cars...

So, I guess my question is, if I put a brand new compressor is that gonna solve my case? Or the same thing is gonna happen?

Thanx in advance, any help will be appreciated!!!

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I had the same problem once...I was recharging my system and my pressure relief valve blew open it didnt blow off and thats what there suppose to do,blow open and relief pressure,and for the most part there just a one time shot once they blow you need to replace it and its a differant type of valve ,its not a shrader valve.The shrader valves are in your high an low ports and they do need to be changed once in awhile there just like a tire valve you just have to get the rite size ...small bore or little bore...hope this helps someone

knytespyder said:

I had the same problem once...I was recharging my system and my pressure relief valve blew open it didnt blow off and thats what there suppose to do,blow open and relief pressure,and for the most part there just a one time shot once they blow you need to replace it and its a differant type of valve ,its not a shrader valve.The shrader valves are in your high an low ports and they do need to be changed once in awhile there just like a tire valve you just have to get the rite size ...small bore or little bore...hope this helps someone

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If it’s blowing off you have a restriction. Find it fix it flush the system put new oil in it vac it then charge it. When you go to charge it the charge should be located under the hood on the data tag. Just weight it in. If you take it to a car mechanic they should know how to do that. It’s not rocket science.