AC warm on driver side, but cool on passenger side

1999 BUICK REGAL
143,000 MILES • 6 CYL • AUTOMATIC
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H. LAMBERT
  • MEMBER
  • 1 POST
AC warm on driver side, but cool on passenger side after a battery failure on a very hot day (95 degrees day) but a new battery has been placed. Driver side actuator was replaced but still has the same issue. I see the old and new actuators both moving when temperature changes. Should the actuators be calibrated when installed with battery reset? Or do I need a new HVAC climate controller?
Jul 29, 2019 at 1:08 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,548 POSTS
I would try to reset the system. here is how: it is more of a functional test, you may have a bad blend door actuator is the replacement a AC Delco? Check out the diagrams (below). Please let us know what happens.

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Jul 30, 2019 at 5:31 AM
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