Does anyone have an answer, My 95 blazer 4.3 has an a/c problem. It works and then it doesn't. a/c works fine then it will just turn off but cold air still comes out the vents the faster you drive the more cold air air you get. The compressor works and cycles the way it should. The system is charged. Anyone have any ideas Thanks Mark

 

What exactly is turning off? Does the fan stop? Does the air switch outlets?

 

fan turns off ,no speeds but compressor still working

 

Does it do this with any fan speed?

 

Sounds like a loose wire somewhere in the fan control, the switch could also be going out.

If you have a DMM you could test the switch for continuity and determine what has power and what doesn't when it isn't working, just find out where power should be but isn't and trace that back until you find the problem.

 

My Blazer is doing the same thing. The harness that attaches to the blower motor under the hood has an issue and I have to wiggle it from time to time. I haven't taken the time to fix it yet, but that might be a place for you to start.

 

Could be your relay too. I've found the best tool for fixing this stuff is a good Service Manual with a good step by step troubleshooting guide. You'd be surprised what it can be. It also explains the system in detail with wiring diagrams.

 

Thanks for all your help it was a loose wire at the fan

 

I have a 95 w/vortek 4.3 & the issue is about the same but not only the a/c it is any of them. I also notice when I hit the brakes it quits blowing. HELP!!!!!