I've known i had a problem with my air conditioner for a while but haven't needed it until now. I've put some R134a (with stop leak) into it (3 cans) and shortly after that, my blazer stopped blowing out cold air. Im afraid that i need a whole new air condition system. Does anyone have an idea on how much that would cost? I would have to take it in to get it done.

 

not sure of the cost, but if you take it somewhere, ask if they have the recovering system that flushes out and puts in new freon and oil.. if they say NO then go somewhere else..Back when i was a Mehcanic at a Firestone back in the mid 80`s any shop who had that had to be licensed to have that machine..and to carry freon.. Don`t know how the laws have changed since then..make sure the orifice filter gets cleaned out real good that stop leak stuff may have clogged the filter..

 

You probably put too much in. My 97 and 98 only take 28 ounces of refrigerant. Too much is as bad as not enough. These orifice tube systems are very sensative to the amount of charge in them.

Try to find someone with guages and that knows how to use them.

Was the AC making any cold air at all before you added refrigerant?

 

1) If it is low on refrigerant, it has a leak. Fix that first.
2) If it's been running a lot of years, or if it's been charged several times, it should have a new "dryer" and "orifice"
3) when you open a fitting, it needs new O Rings
4) If it leaks, it probably is the compressor seal.

Conclusion; Buy compressor, dryer, orifice, o-rings, oil, B-12, 134A. - Disassemble all components, blow solvent through all coils and lines, then blow with clean air (to remove debris and oil) re-assemble with new compressor, components and o-rings, follow compressor manufacture recommendations on oil, Install 28 oz. 134A. Done.

 

I hate to say this because I generaly do things the "right" way, but 3 years ago I took a chance on one of those kits on ebay for ~$160 that comes with pretty much the whole A/C system. I just added a half can of fluid this week and it's still going strong after 3 hot South Carolina summers. I had a good experience with the kit, I cant promise the same for anyone else.

 

I seriously doubt you need to replace that many parts. Replace what needs replacing, repair what needs repaiering. But dont just strat throwing parts at a problem hoping you accidently fix it. Guessing is just too expensive.

 

I have a 2000 blazer with climate control. 138000 miles and going strong, EXCEPT AC will only blow hot air. It is not the compressor, is not the blendor acuator, I have no other ideas. I have checked the sensors behind the vents and that was also ok. Any other ideas? Its really hot and I have really had it. Need this fixed and the guy at the shop quoted me $800 and said it was the blend door, if it wasn't for you guys I would have paid it and been screwed cause there was nothing wrong with it. Went through the glove box and dug it out, it was fine. A pain in the butt to get out of there but it wasn't broke. So now what?

 

Is the compressor engaging? Line getting cold?