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  1. #1
    Join Date
    May 2019
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    Central, IL
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    American standard not lighting all the time

    Hi all, long time lurker first time posting.

    Have an aux080r942v2 that has the update kit installed. New board, inducer, harness.

    Replace igniter 3 years ago with a hot rod , all good until today.

    Igniter glows red hot, gas valve opens , can hear gas , only lights once about 10 trys.

    Cleaned burners, no change.

    Tried 3 different style of igniters, no change.

    Incoming gas psi good, 7.9" natural gas

    Manifold low psi was 2.2, hi 3.5

    Adjusted low psi to 3.5 seemed to help but still doesn't light every time.

    Can light with lighter no problem , definitely not plugged oriface .

    This one has me stumped, any suggestions?

  2. #2
    Join Date
    May 2018
    Location
    Santa Clarita, CA
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    Perhaps the position of the igniter.

  3. #3
    Join Date
    Sep 2002
    Location
    Virginia
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    For some reason the gas mix isn't blowing by the ignitor well

    Either tilt the ignitor , or figure out why the gas mix could have changed its path

  4. #4
    Join Date
    Mar 2018
    Location
    Kansas Flatlands
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    365
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    Quote Originally Posted by Snapperhead View Post
    For some reason the gas mix isn't blowing by the ignitor well

    Either tilt the ignitor , or figure out why the gas mix could have changed its path
    If you have not done it yet run an orfice bit thru the orfice, a white chalky corrosion buildup around the hole can occur and cause this scenero.

  5. #5
    Join Date
    Oct 2002
    Location
    Plano, TX
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    Check gas pressure. Don't assume if it worked last year it isn't a pressure problem

  6. #6
    Join Date
    Aug 2009
    Location
    Beatrice, NE
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    Did yo check igniter voltage?

  7. #7
    Join Date
    May 2019
    Location
    Central, IL
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    Thread Starter
    Thank you all for the replies,.

    I did play with the igniter position with different igniters.

    I have checked checked and adjusted the gas pressure.

    I will check the orifices with proper bit.

    When it does light the igniter is fully in the flames.

    I did not check the voltage to igniter for some reason.

    I will check orifice and voltage and let u guys know.

    Thank you agian

  8. #8
    Join Date
    Aug 2002
    Location
    Southold, NY
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    What was the gas pressure?

  9. #9
    Join Date
    May 2019
    Location
    Central, IL
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    Thread Starter
    Replaced circuit board and igniter under advice from my AS service rep.

    Problem solved.

    Seems as though igniter warmup timing had shortened somehow(bad board).

    Thank u again for the help.

    Matt
    .

  10. #10
    Join Date
    Aug 2009
    Location
    Beatrice, NE
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    Quote Originally Posted by Stoichiometric View Post
    Replaced circuit board and igniter under advice from my AS service rep.

    Problem solved.

    Seems as though igniter warmup timing had shortened somehow(bad board).

    Thank u again for the help.

    Matt
    .
    You didn't time the igniter warm up????



    Just kidding!

  11. #11
    Join Date
    Sep 2002
    Location
    Virginia
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    Quote Originally Posted by BNME8EZ View Post
    You didn't time the igniter warm up????



    Just kidding!
    probly need atleast 50 mississipppi's

  12. #12
    Join Date
    Aug 2009
    Location
    Beatrice, NE
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    Quote Originally Posted by Snapperhead View Post
    probly need atleast 50 mississipppi's
    Nope, on those only about 20.

  13. #13
    Join Date
    May 2019
    Location
    Central, IL
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    Thread Starter
    17 to be exact, the original board seemed to be adjusting the warmup time by a few seconds each time.

    I thought that was normal for older trane/as which is why I didnt recognize at first.

    Turns out it was the older 80 volt ignition systems that varied the warmup time, they dropped that feature on the update kits and all 120 systems

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