Sonata I45 (LF 2015+) :: AC Only Pumped Out Cold Air When It Was On Max Settings


Jul 14, 2015

When I test drove a Sonata Eco last week, I noticed that the AC only pumped out cold air when it was on the "Max AC" setting. As soon as I moved the knob up a bit - still well in the blue territory, mind you - warmish air started coming from the vents. Basically felt like just the fan was on. Power-wise, it was set to "2".

Is this something that's common among Sonatas, or Eco's in particular? Or is this possibly just a result of the car sitting on the lot for a while, and maybe the AC needs a recharge? Living in Florida, good AC is obviously an absolute requirement, and I shouldn't need to keep it on Max all the time just to ensure cold air.

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Video of the sound at cold start up.

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Car looks amazing and am very happy with it.

But lately I have been noticing lots of drone noise coming from the engine, and a really loud cold start as well. The "cold start loudness" goes away after a little bit of driving.

Was wondering if this is just the way the 2.0T sounds, or should i get it checked?

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I seem to be having an issue with my air conditioning. I don't think it's an ID-10T error, but it is very peculiar.

My driver side vents blow hot or lukewarm air, however my passenger vents are ice cold. I have the 15 limited, so it does have the "dual" control, and as such I think the issue may be related to that.

Both controls are set to low, max fan, head only, and AC. The "Sync" and "Auto" buttons have no effect.

Any things I can check? I really do not want to bring it into the dealer as they treated me very poorly the last time I came in and my car was out for a month.

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It seems as though the temperature control is stuck in hot or quit working all together, AND (I'm guessing here) that Max AC overrides the temperature control? That's the only thing that make sense to me.

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I don't know the first thing about cars!

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So I just got my sonata back from the dealer, they fixed an intermediate problem i was having with the starter solenoid when it rained. car wouldn't turn over when key was turned for about 20 clicks.. (free under warranty and got a loaner!) new starter and solenoid!

But when I got my car back i noticed a new humming coming from the AC (passenger side dash) when it was on high.. i never really noticed it before.. do you think this could be from the cabin filter? or the tech that worked on the car messed with the blower?

I was thinking about going back to the dealer and asking my service advisor about the noise.. and if he said it was normal i would walk over to the sales dept and ask to test drive one of their NF's to see if the AC made the same noise.. and either leave the dealer knowing it's a normal sound, or drive the test vehicle up to the service advisor and ask him why this sonata doesn't make that noise?

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