2000 chevy venture 3.4L, I change new A/C Compressor,new Dryer,New Oriface tube and revacumm the system,then recharge 134a, and still NO cooling. what I notes: the high pressure side is cold when the A/C running and to low pressure side is normal, the top right a/c condenser is hot but the left sid is normal. Please I need HELP.