Test 1

Turn on Air Conditioning
Turn on Re-circulation
While driving, Rev engine to 3500 RPM + (enter expressway quickly)
Air Conditioning shuts down
Re-circulation light stays on
reduce speed, engine less than 3k - 3.5k
Air conditioning ramps back up, Re-circulation stays on.

Test 2
Turn on Air conditioning
Turn off Re-circulation
While driving, Rev engine to 3500 RPM + (enter expressway quickly)
Air Conditioning shuts down???
Re-circulation stays off - no light
reduce speed, engine less than 3k - 3.5k
Re-circulation turns on, light turns on and you can hear AC ramp up.
Air conditioning is back up, Re-circulation stays on.