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  1. #1

    Y or G controlling fan speed in cool mode?

    This one has been bugging me. When you call for cooling at stat, Y is energized and so is G. So does the IFC board determine fan speed based on 24v from G and one other input such as W or Y? I think I may have answered my own questions but I want to be sure so I quit thinking about it! Thank You-

  2. #2
    Join Date
    Dec 2002
    SouthEast NC ICW & Piedmont Foothills
    and this has WHAT to do with a fireplace?

    may want to hit that triangle in lower left corner and have a moderator relocate.

    but, your on the right track.
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  3. #3
    who said anything about a fireplace?

  4. #4
    Join Date
    Jun 2001
    Moore, Oklahoma, United States
    G activates heat speed, Y activates cooling speed. If the board gets an input on G and Y it activates cooling speed. W activates heat speed after warm up delay. A few boards have a separate motor speed for fan (mostly Rheem/Ruud).

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