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Q:

Why whenI turn on the a/c and one side blow cold and the other side blow hot air on 1998 Buick Park Avenue

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The ac blows cold on driver side and hot on passanger side why is that so..
(1) Answer
YOU MUST HAVE A DUAL ZONE SYSTEM , CAN BE SEVERAL THINGS , MOSTY IT IS THE HEAD UNIT, OR THE SERVO MOTERS GOIN BAD THAT CONDTROL THE BLEND DOORS.
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