a/c woes

i have a 68 gtx. i replaced every part in the a/c system. compressor (new sanden unit), condensor, evap, expansion valve, everything. i even had the heater valve in the box and the one on the firewall rebuilt. my pressures are dead on and my expansion valve is frosting. my driver side vents are blowing cold and my passenger side vent are blowing warm...any ideas?

Have you checked the ducts for damage and the actuators to open the doors properly?

Have you checked the ducts for damage and the actuators to open the doors properly?

yes sir. i have all the ducts disconnecvted so im feeling the air as it comes out big rectangle hole out the front of the box.

Drivers side cold, passenger side warm, doesn't make sense since the air comes from the same location and the ducts are good as you say. Hummmm!!!

Does sound strange. Does the air flow increase on the pass side when the fan is set to high? Slide the temp lever to warm and see if the pass side air gets warmer or remains the same. Your description sounds like you are pulling outside air on the pass side.

Isn't there a big vent door on the pass side in front of the squirrel cage?

Could the heater core be getting hot engine water even when the A/C is on?

Could the heater core be getting hot engine water even when the A/C is on?

Yes, if the valve is malfunctioning or not adjusted properly.