Overheating

New water pump, new radiator and cap, new temperature sensor. New cooling fans they both come on with the A/C and when the car gets warm on their own correctly. A/C relays okay, no exhaust gases in the radiator confirmed with chemical test. New thermostat no leaks anywhere that I can see. No white smoke in the tailpipe. Heater works excellent except on the passenger side A/C works great on both sides until the temperature gauge gets to about half then it blows warm. I can't think of anything else to check. What am I missing here? If I turn the A/C off it'll cool off a little bit then right back up. When I turn the air on again but will still overheat whether the A/C is on or not.