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  1. #1
    Join Date
    Jun 2010
    Location
    Nelson, Canada
    Posts
    12

    need Armstrong igniter advice

    Looking at an Armstrong 80 GUJ100D12-2B furnace that's not igniting but I am unfamiliar with the hot surface ignition system. Just trying to determine if it's the gas valve or igniter, What kind of voltage should I be seeing on the igniter leads? I'm getting 6 volts.

  2. #2
    Join Date
    Feb 2010
    Location
    Calgary, Alberta
    Posts
    1,108
    Is there a smart valve on that furnace?

  3. #3
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,577
    Quote Originally Posted by zacmobile View Post
    Looking at an Armstrong 80 GUJ100D12-2B furnace that's not igniting but I am unfamiliar with the hot surface ignition system. Just trying to determine if it's the gas valve or igniter, What kind of voltage should I be seeing on the igniter leads? I'm getting 6 volts.
    With the pilot burner cable connected, and voltage measurements taken while the ignitor is powered, you should have 24 volts.

    Ignitor should ohm out at less than 10 ohms.
    Instead of learning the tricks of the trade, learn the trade.

  4. #4
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,588
    Hey rundawg, do you have any sort of file on ohm reading for different ignitors? I just would like something to save or else I forget.

  5. #5
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,577
    Quote Originally Posted by Joehvac25 View Post
    Hey rundawg, do you have any sort of file on ohm reading for different ignitors? I just would like something to save or else I forget.
    I don't have a break down for each and every ignitor on the market, but I sent you an email with what I have.
    Instead of learning the tricks of the trade, learn the trade.

  6. #6
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    The resistance of a Norton silicon igniter used in the Q3450 or Q 3480 pilot assemblies, when new and
    cold, will be between 3 and 4 Ohms (average 3.7 Ohms) as the igniter ages the resistance will increase. When
    its resistance reaches 10 Ohms the igniter should be replaced


    anyone have a better cut & paste about the ignitors
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  7. #7
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,588
    Quote Originally Posted by rundawg View Post
    I don't have a break down for each and every ignitor on the market, but I sent you an email with what I have.
    Thanks for that, any info I don't have to try to remember is good info lol.

  8. #8
    Join Date
    Jun 2010
    Location
    Nelson, Canada
    Posts
    12
    That helps, thanks guys.

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