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  1. #1
    Join Date
    Jun 2005
    Location
    The Gray Northwest
    Posts
    661
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    Honeywell Stat Filter Alarm

    Gotta HW T238A2004 stat that will alarm when it's time to change the filter. It's a time based function that I am wondering exactly how it counts. Does it actually start counting when the system runs in heating or cooling and than stops counting when the cycle ends or is it basically a calender day counter? The reason I ask is I'm thinking of using it as a cycle counter to determine actual system run time, if it actually works that way.

  2. #2
    Join Date
    Dec 2007
    Location
    Western U.S.
    Posts
    34
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    I believe that stat counts blower (indoor fan) run time.

  3. #3
    Join Date
    Dec 2007
    Location
    oregon
    Posts
    885
    Post Likes
    The timer will count accumulated fan run time

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