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Kia forte 2011 1.6 - Manual AC

1053 Views 7 Replies 2 Participants Last post by  Momin
Hello, I have ran into a peculiar problem with My 2011 Forte1.6 - manual AC. The car's AC and recirculation buttons don't light up when i leave for work in the morning, only the fan works, sometimes the buttons would start working on their own after 20-30 minutes of driving; however it almost always works in the afternoon when the car has been sitting in the sun for a while, and when it works it blows perfectly cold air.

Some info that maybe useful:
  1. I have checked all the related fuses and they are all okay.
  2. These problems didn't exist before I installed an android head unit, but i pulled the units fuses to deactivate it but the problem persists even when the head unit is not getting power.
  3. When i turn on the heater, AC blows hot from driver vents and cold from passenger vents, maybe actuator is causing this other issue as well? but I had this issue for more than year.
  4. The defrost button lights up very dim (not visible unless seen in pitch black) unless the other two buttons light up, but when i press the defrost button it makes a clicking noise near Fuse switch board. When the AC and recirculation buttons light up properly, defrost button also lights up brighter.
Someone else is also facing the exact same issue, even though they don't have actuator problems, they couldn't find a solution for it.

If anything is not clear please let me know, English is not my first language.

Any suggestions are welcome. Thanks a lot.
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Remove the HVAC control unit. See if it's plug is melted, loose or the wire harness & pins are connected & locked into place.

Can also be the unit is finally going out. Open it up & see what's going on inside. If you do open it. Take before, middle & after pics.
Cold contracts, heat expands.

If it only operates as manufactured in high heat exposure, that means the metal contacts move/expand or make contact to complete circuit. It's not solder point on the circuit board. Solder needs extreme heat to liquefy.

Check the wires, plugs.

Check the HVAC blower fan as well. Check & verify the wires are in good condition, the plug/pins as well. Check for burn marks along the wires & at the socket & plug.

Kia/Hyundai, new vehicles are wired like Xmas tree lights, one goes out the others will follow. Instead of that part goes out & the rest are working properly, series vs parallel circuit.

Visit your local Junk/salvage yard for oem/factory bandaid parts.


Last resort is your local dealership
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