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Thread: C5 Cooling

  1. #1
    New Member
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    Apr 2007
    Norman, Oklahoma
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    White 2003 Coupe

    Default C5 Cooling

    Is the cooling fan on a C5 supposed to run after turning off the engine until the coolant cools off? Mine is not running and I can't remember if it used to. Temps out side here >105deg and it is running a little hotter 235deg but after sitting off a few minutes then turned back on reads >255deg. Thanks

  2. #2
    Member timfitz63's Avatar
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    May 2010
    Pittsburgh / South & Centrl TX
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    '98 Aztec Gold Coupe; '04 Millennium Yellow 'Vert'


    I can't ever recall having mine continue to run after shutting off the engine.

    1998 Aztec Gold #15||| 2004 Millennium Yellow

  3. #3
    Member Mr. Lucky's Avatar
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    Aug 2004
    Orange, CA
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    2004 MY stroker Coupe


    It can be programmed to do so (mine does), but that's not stock behavior.
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  4. #4
    Technical Writer for Internet & Print Media
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    Jan 2001
    Southern California
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    71 95 04 12


    The stock fan-on calibration for C5 almost never has the fans running with the key off. The only times that may happen is if the engine is either overheated or near being overheated.

    As "Mr. Lucky" says, that part of the fan calibration can be changed but you need HPTuners to do it. A hand held reprogrammer can change the fan-on temperatures but it cannot alter the way the fans operate when the key is off.

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