It was the first really cold day since I got my car--40 degrees F. outside. I hit the Auto button and bumped the temperature up to 78 degrees. The A/C light came on. I tried turning the system off and then on (now that the temperature is set higher), and I got the same thing: the A/C light came on. Is this normal or should I have this looked at next time I take my car in for service?
You should be able to heat without the A/C but note that if you're in AUTO and the A/C light is on, it doesn't mean it's running. The two lights mean that the A/C compressor is in AUTO and will cycle on and off as needed. In addition, if it's humid, you would be advised to keep the A/C light on with AUTO so that it can act as a dehumidifier and dry the air so that your windows don't fog up (especially if you have to hit recirculate to keep diesel fumes or other smell out).
