View Full Version : 2009 Hyundai Sonata AC Switch

03-17-2014, 04:16 PM
Had the starter replaced two weeks ago, now the AC is always on. How can I check whether the switch is stuck? I disconnected the battery once and it seemed to work, but now the AC green light is on again.

03-18-2014, 08:58 PM
Ooh, that's kind of a tough one, seeing as how that system is probably computer controlled. The best place to start might be to see if any trouble codes have been set in the BCM (body control module). Unfortunately, most consumer grade code readers don't have the ability to read body codes.