Question about Hyundai Sonata

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I can't change the air temp from hot to cold air. Hot only.

My temperature control does not change from hot to cold. I think it is temp switch. It only blows hot air. I can't change it to cold after my wife changed it to hot one day to defrost the windshield.

Is is a fuse or a sensor? How can I fix it.

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  • armandhammer Dec 08, 2008

    I have a similar problem with my 2003 Santa Fe. If the temperature control (dial) is set all the way to WARM, it blows hot, but if the dial is turned even one tiny click back from the full WARM setting, it starts to blow cold. ANy ideas?



    Thanks.

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The first thing to d is to go under the hood and see if eh cable is stuck if it is not then it has disconnected from its position secondly yu may have a heater control valve which is broken inside which means the water is still flowing nd the heater is on wheher o choose hot ot cold.

the only way t fix the heater control valve is to repace it

Posted on Nov 14, 2008

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Sorry for your troubles ,
Temperature Hand in dash reading NORMAL ?
Does it Turn Blue to Red if so is do you feel friction or restraint like your turning something rather than freewheeling (smooth fast turning) or Digital and or does it show that it should be warm and not cold ?
Does the TEMP change at all(even the least little bit could narrow the results down) when knob is turned?
POSSIBLE - The Actuator/Motor that switches the VENTS very well could be BAD , Temperature Switch / Climate Control Switch (hot to cold could be broke at the base and only allowing the knob to turn and not in the switch ) Thermostat may be stuck open (keeping the engine running cool and smooth but no heat , maybe just a slight TEMP change when switched from Cold to Hot ). The A/C Switch is pushed in or turned on or broke and is stuck ON
FIXES - 1st- Check FUSES - If Temp HAND Reads Normal it not your THERMOSTAT. - Change the Control Switch / Temp switch - Check A/C Button/Knob . AUTOZONE is my place of business they PRICE MATCH AS WELL!
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