i dont know what is the problem is there any valve for that or i need to change the compressore
the AC codition dose note give any colling unless you accelarete hard i dont no on 2008 Ford Escape Hybrid
ck freon level to start with or get a diag of system
May just need a little more coolant. Needs recharged is probably the problem. Find the low side service port and add more refrigerant : http://www.justanswer.com/ford/6q1bo-ford-escape-hybrid-need-locate-a-c-low-side-service-port.html
Does it cool while driving down the road, from a normal start, without reving engine and running off of either power mode?