A/C Not Working
#1
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It seems that every year, my A/C stops working. I have been able to fix it in the past but now I am stumped. All the hoses and tubes are new as of last year. The compressor kicks on and immediately back off. My uncle hooked his gauges up to it and put a can of freon in it. We then discovered that the line going into the evap core is cold, but not coming out. The reason I don't think the core is the culprit is b/c the pressure is not building as if it were blocked. Any suggestions on what to try next? ![Confused](https://chevroletforum.com/forum/images/smilies/confused.gif)
2001 Silverado 1500 LS Z71
![Confused](https://chevroletforum.com/forum/images/smilies/confused.gif)
2001 Silverado 1500 LS Z71
Last edited by opie44; June 12th, 2013 at 4:29 PM.
#2
Super Moderator
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On the accumulator, there is a low pressure switch/plug. Pull that plug out and jump it with a paper clip in each side. If the compressor kicks on, then the switch is bad. They're stupid easy to replace. You can get a good grip and turn it off by hand. When replacing it, hand tighten it then tighten it 1/4 of a turn more and thats it. On the switch itself(accumulator side) there is a rubber band on it. That rubber band is important cause you'll need to get the same colored one when you replace it. Has to do with the pressure it reads.
#3
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Thats one of the things I am gonna check today. I had to replace that switch a few years back so I know the procedure. Back then though the AC would work for 10 minutes and then cut out. That's why I was a little hesitant to try that first.
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