static pressure equalization time frame.

[mbt]

What is the typical time for pressure to equalize after shutting down ac system. I am seeing 4-6 hours before they do which I think is to long, any idea what could be the cause. Thanks 2007 VW Sanden compressor.

[tbirdtbird]

Wait....does it blow cold?

[mbt]

yes it blowing cold and then goes warm and goes back to blowing cold.

[tbirdtbird]

Could just be the compressor cycling. Is this new behavior? How long warm and how long cold? Idle or on the hiway?

Set up your manifold and provide the following data:

ambient
set RPM to 1500-1800
center vent temp (fan max, max cold setting, recirculate)
Hi side psi
lo side psi

(for the record pressures at idle do not help)

What work have you done to the system?