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I am installing a S1-43101972100 control board to replace Evcon 2702-310/A. Where do I connect the M1 wire from the blower motor and where do I connect the COM & 24VAC wire on this board?

The old board has an locations for these wires to be plugged but the new board does not have an location.

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There is a wiring harness for this conversion. i have included a link to a source. It may be difficult to find a schematic to make this conversion and safer to use the harness. Control Board S1 43101972100

Posted on May 15, 2014

  • 1 more comment 
  • Tax Fletcher
    Tax Fletcher May 15, 2014

    Yes I have the wiring harness, however those three wires don't have an connection on the board.

  • Hjalmer Lamminen
    Hjalmer Lamminen May 16, 2014

    If that is the case then the board must be set up in a way that you don't need to hook up those wires or it would have come with instructions on how to do that.

  • David Seeger
    David Seeger Sep 22, 2014

    Tax Fletcher did you ever figure out where to hook up the M1 wire? I am in the same exact situation as you. I have installed the board and also the wiring harness (which has a 12->9 pin and 6->4 pin wiring converters). There is a "park" on the new board where I am thinking I should put M1. On the old 2702-310 board I noticed the M1 contact was simply soddered to the back and didnt go anywhere - as if it were stubbed out. Is this what "Park" does on the new board? Thank for any help!

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