My ac sounds like it’s on high but it just puffs out air ---- when I put the heater on defrost – on the right side of windshield it comes out hot and on the drivers side cold ---- when I just have the heat on – it only comes out of the floor and not the vents and it only puffs out luke warm — this is a 92 Cadillac Sedan Deville with electronic climate control---- I can’t choose anything but temp (auto or defrost!)
Probably some kind of control module that’s bad.
Time to get a factory service manual or a mechanic experienced with this vehicle.