A/C light turning on

2010 CHEVROLET EQUINOX
120,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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ROB CARNINO
  • MEMBER
  • 7 POSTS
When I use my remote start or start the car manually the A/C is light is on. I have some heat but not a lot. If I turn the temperature control knob I hear something like something is shutting (not clicking like other things I read). any advice on what that could be and why the A/C always come on first?

Thanks
Feb 19, 2021 at 8:51 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
More than likely the A/C is coming on because there is high humidity. The HVAC control module wants to remove this moisture from the air so that when it is blowing it doesn't fog the windows and has a better ability to defrost the windows. If you are blowing moist air onto a cold window it is going to fog or frost so it is try to control this humidity and it can only do that by running the compressor.

As for this noise and heat issue, this sounds like blend door issue but it would really help if you could get a video of this noise so that we can get a better idea on what needs to be done.

Here are some guides that have some good info in them but hearing this noise will tell us if we are on the right track:

https://www.2carpros.com/articles/car-heater-not-working

https://www.2carpros.com/articles/replace-blend-door-motor

Thanks
Feb 20, 2021 at 8:10 AM
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