1996 tahoe ac problems

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letsbangout

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No, you don't want to replace only the o-tube if it's messy. What would that solve? By that logic, you could simply blow it out. Rather, if it's cloudy there's a reason, and more times than not, it's caused by debris deposited into the system by the compressor (i.e. because of the breakdown of individual cylinders). And they're only 9 bucks btw, not 40 or 50.

Also, contrary to what was written above, you really can't flush through muffler hoses. That is to say _you_ can't. Shops likely can because some of them have closed-loop pressurized fluid flushers that'll flood all of the muffler chambers with enough fluid to wash out anything solid, eventually, with the passing of time. If you absolutely must re-use them, it might be a good idea to suck them out with a Shop Vac, in both directions, using your hands and other objects to intermittently open and close one end, as to create suction. Based on getting burned on so many AC systems, I'd say you can't possibly be diligent enough when it comes to flushing everything out. Also, verify that you don't have a parallel flow condenser - I'm told by a dealership tech that you shouldn't even try to flush those things if you have debris in your system - just replace them (and keep in mind, dealerships have those big honkin' GM closed-loop flush machines that supposedly do things "the right way").
 

SunlitComet

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There are several switches and how they are troubleshooted depends on which one. Only buy acdelco or Delphi unit parts and use the same compressor type that was factory installed.
 
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mwj1969

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It was the cycling switch, i guess the old one just got weak .thanks for all the help.
 
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mwj1969

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yes ----mid 40's out the vent. the switch was working but it cycled off at around 33 on low guage ,the new one goes down to around 18 on low before it cycles off .the problem looked like a low freon,weak compressor it pays to replace the cheap stuff first.thanks for all your help
 

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