AC IS COLD,BUT DRIVING AT HIGHER SPEEDS TURNS WARM AND WHEN I STOP AC GETS COOL!

Check to make sure the belt at the AC is turning properly. Make sure it's tight with the correct deflection up and down (half inch Max). Have someone accelerate while you watch. Goodluck

ck to see if a/c is deflecting to the defroster if so u have a vac leak a line that supplies vac to controller