AC Operation on 2001 Cadillac Eldorado

When AC is on air vents passenger side get cold, but air vents driver side blow out warm air

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1 answer
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.