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  • msearcher
    Handyman

    • Mar 2011
    • 125
    #1

    Main board

    Can a 422 board be used in a 441 and the reverse without any setting adjustments?
    Tags: None
    • hawkins111
      Master Journeyman

      • Mar 2010
      • 752
      #2
      No you can not use a 422 board on a 441. The fuel pump control is on the board and the two heaters are different.

      Tom

        Comment

        • msearcher
          Handyman

          • Mar 2011
          • 125
          #3
          Originally posted by hawkins111
          No you can not use a 422 board on a 441. The fuel pump control is on the board and the two heaters are different.

          Tom
          Thank you, that is what I thought, noticed someone had a board that could be used in either and I did not believe that was correct.

            Comment

            • Bryand
              Handyman

              • Dec 2011
              • 99
              #4
              Originally posted by msearcher
              Thank you, that is what I thought, noticed someone had a board that could be used in either and I did not believe that was correct.
              I have used the 422 in a 441 and worked fine. You can also use the 441 in the 422 as long as you are using a external tank.

                Comment

                • hawkins111
                  Master Journeyman

                  • Mar 2010
                  • 752
                  #5
                  Fuel flows from a M422 board at the rate of .07 gph on low and .164gph on high. A board for a M441 provides a fuel flow at .12 gph on low and .319 gph on high. Using a M441 board on a M422 will cause an over firing condition by almost 100%. This is a very dangerous condition. Tom

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