Basically, the compressor kicks off when the blower is on high and it is warm outside after a few minutes. I have had the dual pressure swirch changed, and most recently the expansion valve and suction throttle valve with no improvement. Any ideas? Thanks

 

what's your low side pressure at while the compressor is running?
does your compressor clutch engage when the blower is on and a/c is on? - sorry...i'm sure u addressed this in your original post but i need some clarification

u mentioned have the some repairs done to the system....do u know if corresponding o-rings were changed as well?