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  1. #1
    Join Date
    Oct 2004
    Posts
    22
    How do you tell when a Dual stage furnace is in high or low

  2. #2
    Most stats have a low/high fire indicator.

  3. #3
    Join Date
    Oct 2004
    Posts
    22

    Dual Stage

    The thermostst is a Honeywell Focus Pro TH 6220D

  4. #4
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,304
    The stat won't have anything say hi or lo fire..

    You can tell by the blower sound.. Low will be quieter, and high will notice a higher blower speed.

    On my Vision Pro, I wired the w2 to light up the red LED.

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