Heater/Air Conditioner comes on by self

Asked by Oct 15, 2013 at 12:57 PM about the 2010 Hyundai Santa Fe 3.5L SE FWD

Question type: Maintenance & Repair

I have a 2010 Santa Fe, my heater/air conditioner will just come on by it self.  I will push the off button and at times it will just come back on.  I have replaced my battery (it would not turn over) over the weekend.  Put it is still doing this.  My mechanic say he has never heard of this happening.

9 Answers


hi i have a 2005 santa fe 2.0 diesel auto and have same problem and cant find an answer as to why anywhere on the web. pls help

4 people found this helpful.

My 2010 Santa Fe is doing the same thing and it's really bugging me...please post if you learn of a remedy

5 people found this helpful.

Did anyone ever find out what is causing this issue? I have a 2010 as well and it is doing the same thing. They even just replaced the condenser for the A/C.

3 people found this helpful.

Mine is still doing the same, turning on by itself and not turning off...now I have the additional problem of the air conditioner turning off by itself when I want it on :(

4 people found this helpful.

easy fix ! my 2012 santa fe had same problem . I changed the cabin air filter and fix the problem since then . I think the dirty filter has something to do with it .

2 people found this helpful.

I just bought my used 2012 Santa Fe from a VW dealer and it has the same problem. Per the above post, I went to change the cabin filter but found that it was perfectly clean already, so that's not the cause of my a/c turning on automatically. If anyone else has any other suggestions, please let me know!


I was told it was the control panel causing the issue. Since I had already put in quite a bit of money on other problems, I decided to trade it in for a Toyota. Apparently the 2010 V6 model was known to have issues. Sigh

1 people found this helpful.

Was told it is a module Mine a is 2010 santa fe, told its common

I have a 2012 and it’s been turning on the a/c randomly for about 3 years now I’ve just been dealing with it never fixed it or looked it up how to fix it. I always change air filter- Now problem is when I turn on ac my car dies!!!! Great great!!

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