Flame sensor ao smith propane.

Discussion in 'Water Heaters and Softeners' started by Bigfatricky, Apr 9, 2018.

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  1. Apr 9, 2018 #1

    Bigfatricky

    Bigfatricky

    Bigfatricky

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    I have an ao smith fpse 75 propane series 251. My flame sensor is broken, the tip broke off. From what I understand, the way the sensor works is that the flame itself acts as a switch, creating a ground that tells the "smart valve" the flame is present. This made me think I could just ground the sensor to the burner, but that doesn't work. What can I do to trick the valve into thinking there is a flame? I have a new one in transit, but I am a dairy farmer and I need hot water in a big way.

    Anyone?
     
  2. Apr 9, 2018 #2

    Bigfatricky

    Bigfatricky

    Bigfatricky

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    Can I put a resistor from the tip to the burner? Is the valve sensitive to this? I can't imagine the flame creates a zero resistance ground path.
     

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