Possible problem with HVAC system? Quick Question ..
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2008-2013 Cadillac CTS General Discussion Discussion, Possible problem with HVAC system? Quick Question .. in Cadillac CTS Second Generation Forum - 2008-2013; I'm from north of the 49th and it's starting to get cold up here. I've been using my heat alot ...
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    BMANN06's Avatar
    BMANN06 is offline Cadillac Owners Fanatic
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    Possible problem with HVAC system? Quick Question ..

    I'm from north of the 49th and it's starting to get cold up here. I've been using my heat alot and notice everytime I set my hvac to auto, my ac turns on (the light with the snowflake) even though I've got the heat cranked. Is this normal behaviour? I don't really understand why the ac compressor should come on for heat, and can't remember if I had this symptom last winter? Is this normal and I'm just a tool ... or have I got a problem?

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    C&C's Avatar
    C&C
    C&C is online now Cadillac Owners Connoisseur
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    Re: Possible problem with HVAC system? Quick Question ..

    The a/c compressor comes on for de-humidification; it is normal (and beneficial). Now if you don't need to de-humidify then you can turn off the compressor manually though it also beneficial for your system to run it occasionally during the winter to keep the seals lubricated..

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    BMANN06's Avatar
    BMANN06 is offline Cadillac Owners Fanatic
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    Re: Possible problem with HVAC system? Quick Question ..

    Thanks C&C!

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