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A/C light comes on every time you start the car?

Tiny
BLACKRW
  • MEMBER
  • 2001 HYUNDAI SANTA FE
  • 150,000 MILES
The ac turns on every time we start the vehicle. We have to turn it off.
Thursday, December 29th, 2011 AT 8:57 PM

6 Replies

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Use a meter or test light to see if the AC switch is shorted internally.
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Thursday, December 29th, 2011 AT 10:07 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Is it set to defrost?
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Thursday, December 29th, 2011 AT 10:27 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Many cars are programmed to do that intentionally now. It removes moisture from the cabin air.
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Thursday, December 29th, 2011 AT 10:46 PM
Tiny
BLACKRW
  • MEMBER
  • 2 POSTS
I understand the ac compressor runs to remove moisture but the actual a/c light on the switch comes on when I start the car. As if after I start the car I would want to start the a/c so I would push the a/c button. Well now, when I start the car it is already on. So every time I start it I have to push the button to the off position.
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+1
Thursday, December 29th, 2011 AT 11:34 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You may have a bad Control Head then.
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Thursday, December 29th, 2011 AT 11:53 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Hyundais are noted for strange problems!
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Friday, December 30th, 2011 AT 7:00 AM

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