A/C issue

2012 KIA SEDONA
152,000 MILES • 6 CYL • 2WD • AUTOMATIC
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NASER NASER
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So whenever i turn the A/C knob on the A/C display to speeds 1, 2, or 3, nothing happens. blower does not come on and the A/C button cannot be displayed in green or does not show it to be on, but when i turn it on 4 the A/C button lights up but only cold air is felt in the rear. nothing comes from from vents.
Jul 11, 2020 at 8:49 AM
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ASEMASTER6371
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Good afternoon,

I attached a wiring diagram for you of the system. From the looks of your description, there seems to be either the front blower motor or the resistor that is the issue. If you have a test light, we can do some voltage checks on the system.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

In the first diagram, I circled the fuses that need to be tested to be sure the power is available. We need to verify power through the blower motor to the resistor.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Roy
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Jul 11, 2020 at 1:07 PM
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started by checking fuses under hood and all are good. looked at blower wire and was about to remove it to check power, and when I did the blower started working at all speeds, so for now A/C works fine, not sure what it is.
Aug 31, 2020 at 4:54 AM
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ASEMASTER6371
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It sounds like a poor connection.

Clean up the connections and see if that takes care of it.

Roy
Aug 31, 2020 at 5:01 AM