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AC compressor question


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Posted

I noticed today that my AC compressor is cycling in and off.  It runs for about 3-4 seconds every 30 seconds or so.  The AC is off on the dash and the HVAC is set to dash with the fan on low, but not off.  Turning the AC on made no difference.  It was about 45 degrees out, dry and sunny.  2000 GMC Sierra 1500 SLT.

 

My question is, is this normal, or do I have an issue?

 

I found this while trying to diagnose a noise.  This doesn't appear to be the cause of the noise, but it has me scratching my head.  Any help would be appreciated.

Posted

Turn the fans to the floor or vents and see if it stops.

 

Defrost/windshield will run the compressor.

Posted

Needs diagnosis to determine where it’s leaking Freon from. Probably the pressure switch or AC fittings


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Posted

Well, warmer weather will be here soon.  I'll test it then and see if it needs filling.  If so, I can start looking for leaks.

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