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  1. #1
    Join Date
    Feb 2006
    Posts
    68

    Question What color should liquid propane (LP) flame be for a boiler?

    I have a boiler furnace that is fueled by LP.

    What color should the flame be that burns to heat the tank?

    Thank you.

  2. #2
    Join Date
    Aug 2006
    Posts
    6

    LP flame

    Your flame color should be blue, if it is burning yellowish it will soot up your heat exchanger. A Yellow flame is caused by incorrect fuel and air mixture, either starving for air or to much fuel.

  3. #3
    Join Date
    Feb 2006
    Posts
    68
    Thank you roxosix.

    Mine is blue.

    I was just trying to eliminate reasons why I am getting lower efficiency out of my boiler this winter.

    It's not the fuel/air mixture.

  4. #4
    Join Date
    Aug 2002
    Location
    manitowoc wisconsin
    Posts
    4,943
    Honestly the color of the flame does not mean a pinch of sh*t without knowing the type of burner you have.An old monoport sunflower burner would be producing carbon monoxide through the roof with a blue flame.The only way to tell what a flame is doing is to test it with a combustion analyzer.
    Take your time & do it right!

  5. #5
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    Quote Originally Posted by markwolf View Post
    Honestly the color of the flame does not mean a pinch of sh*t without knowing the type of burner you have.An old monoport sunflower burner would be producing carbon monoxide through the roof with a blue flame.The only way to tell what a flame is doing is to test it with a combustion analyzer.
    Yep.
    Perhaps you should have read the instructions before calling.

  6. #6
    Join Date
    Jul 2002
    Location
    St Paul, Minnesota
    Posts
    3,468
    And don't forget to have the gas pressure checked. It should be set to manufacturers specs. Could be overfiring and still be blue.

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