When AC is on air vents passenger side get cold, but air vents driver side blow out warm air
AC Operation on 2001 Cadillac Eldorado
I sounds like a sticking drivers side air temperature door actuator on your 2001 Cadillac Eldorado. If that is the case fault code(s) Should be stored in the A/C control module. These codes can be retrieved using a scan tool and help in diagnosing the fault.