AC Compressor runs for 45 mins and shuts off

[battibatch]

Hey gang:

This is on a 1997 Chevy C2500 with a 5.7L. It has a new AC compressor, AC condenser, AC Manifold hoses (suction and discharge). After an evacuate and recharge, the AC blows ice cold for about 45 mins (driving or at idle) and the compressor clutch stops. When the clutch stops turning the compress, the gauges read ~40psi (low) and ~245psi (high) with ambient temp around 95 degrees F. During this 45 mins, the compressor runs constantly.

I am not sure what the problem is. My next step is to start replacing sensors, but I figured I would ask first. Any help would be appreciated.

 

[east302]

Was the orifice tube replaced? How about the cycling switch on the side of the accumulator?

Maybe this will help, diagnostics below are for a 98 but should apply to your 97.

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[battibatch]

Was the orifice tube replaced? How about the cycling switch on the side of the accumulator?

Maybe this will help, diagnostics below are for a 98 but should apply to your 97.

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No and no, although I have both. I did not do the orifice because I think it was done when the hose was replaced. The cycle switch just came in today. I’ll read through these diag tables and get back to you with the outcome. Thank you for the quick and thorough reply!

 

[herbthe3rd]

Did you ever figure out was causing it to stop after 45 minutes?

 

[outlawten5]

Compressors are supposed to cycle so as not to freeze up the evaporator. Mine would cycle every 15 minutes in the humidity of Florida

 

[battibatch]

Did you ever figure out was causing it to stop after 45 minutes?

YES! The solution as the cycling switch on the accumulator. A ~$15 part on Rock Auto and it is blowing cold! Thank you for the help. This thread can be closed, solved.