Scotty,

I have a 2014 Hyundai Santa Fe Sport that has the automatic climate control. I live in FL and it is hot. I have the AC set at say 76 degrees in AUTO mode and it cools fine. Except then all the sudden you can see that the control unit will switch to the heater (the display show the air has switched to blowing out of the floor blowing hot air and the fan increases and the car gets extra hot since it is Florida and there is no need for heat!) BUT it is still set at 76 degress (no adjustments were made) and the inside of the car is HOT. Then it will switch back to regular operations and go back to cooling. Sometime to prompt this I turn the car off and back on. Sometimes I just manually put it to max cool at 62 degrees, but at 63 it still thinks the car is cold in need of heat. It seems to be Haywire. I have taken it to the dealer two times and they say "we can't duplicate the problem". It does this sporadically so it is hard to have it happen when you want it too. It sure seem to me something is not working correctly. I am assuming a sensor is bad. They can't find it. Any ideas? Thanks, KTWid

Comments (4)
No. 1-3
Mganon
Mganon

I have a 2013 with a very similar intermittent failure. Dealor wont look at it without upfont payment. Local shop cannot find it. Any direction they should look?

It did improve when i changed the cabin filter. It happens less but still about 1/2 of the time.

ktwid
ktwid

Thanks, I have taken it to the dealer more than once. They keep saying "we can't duplicate the problem" but when I leave the problem occurs again. It does occur sporadically. It seems to be whatever senses the temperature in the car is not giving the computer the correct information. The climate control is set on AUTO at 70 degrees. With no change to that, what could cause the computer switch from blowing cold air (AC on) to blowing heat (with the outlet vent moving to the floor) and the fan increasing to near max when it is 91degrees outside and I am sweating in the car?

ScottyKilmer
ScottyKilmer

Editor

only way to figure that out is with a dealer level scan tool, so find someone with one