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A/C issues 1998 silverado

PorkPieGuy

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PorkPieGuy Enthusiast

PorkPieGuy

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I bought my Silverado/K1500 a few weeks ago. When I bought it, it just had a used-but-working compressor. While I've not run the ac every day, it has never failed to deliver...until today.

 

I got home and checked it out. The compressor is doing something pretty weird. It's cutting on and off every 3-4 seconds with the ac going full blast (it's blowing outside air through the cab). I read online that the first thing to do is make sure it's topped off with coolant. So, I did that while being sure not to overfill. Same thing happened with the compressor. This time maybe the intervals for staying on was a little longer but not much.

 

Did some more research. Found out it's probably the low cycling switch for the ac unit. I replaced it (and the O ring). Same problem. Even checked coolant levels again just to make sure everything was still fine which it was.

 

We just spent about $1400 getting my wife's ac fixed in her car, and we can't afford to put money into my truck right now. Any advice y'all can give would be great and well appreciated.

SouthernSilveradoGuy85 Senior Enthusiast

SouthernSilveradoGuy85

Posted
Posted

I'm also in NC so the truck isn't a Pewter color extended cab Z71 is it? lol I had a 98 that had awesome AC until it wouldn't stay charged and never got it working like it used to when I got rid of it. I know I changed the compressor and the 2 o-rings on top of the compressor. Couldn't find where it was leaking.

PorkPieGuy Enthusiast

PorkPieGuy

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Did a little more research this morning on my computer as opposed to trying to do so on my phone.

 

Since I've topped off the freon (or coolant) and changed out the low cycling switch to no avail, would a clogged orifice tube cause this to happen?

2018GMC Senior Enthusiast

2018GMC

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Posted

Yes. Especially if there was a compressor failure in the past.

PorkPieGuy Enthusiast

PorkPieGuy

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Yes. Especially if there was a compressor failure in the past.

 

Ok, sounds good.

 

Does one need to evacuate the A/C system before installing this?

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