I have a similar problem, just charged my ac and it is barley even cool, i think the compressor is on its way out aswell.

i believe my mono valve has been bad for a long time, i thought a symptom of a bad mono valve was the heater working until you get up to speed and then wont work again until the car is shutdown.

I was unaware it would affect the A/C cooling.

But my vacume pump that controls the doors behind glove box is dead, would this affect cooling?