Climate control not working?

JRSWIFT1979

MEMBER
2009 KIA OPTIMA
4 CYL
2WD
AUTOMATIC
66,000 MILES

I drive a 2009 Kia Optima. When I got into my car this morning, I found that most of the climate controls are not working. The fan speed dial works, and I can turn it on and off. But it seems that the temperature dial will not respond to any changes, and it is stuck spitting out hot-warm air, which is not something I need in Las Vegas. Likewise, the AC button light will not turn on, and the AC won't actually turn on. Also, the two buttons to switch between recirculate and outside air don't respond or light up. And the button to turn on rear defrost has the same problem as the AC button. No light and no function. Any information, or assistance anyone could pass my way would be very useful. Thanks!

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

This is most likely the control module itself has failed. If the blower and other components are working then that means it is getting power and ground so more then likely it has just failed internally.

Here is a guide that will help with this:

https://www.2carpros.com/articles/car-heater-not-working

Also, I included the wiring diagram and repair process for the control module so we can replace that as this is what is going to be needed. Let us know if there are questions. Thanks

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