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  1. #14
    Join Date
    Apr 2012
    Location
    winnipeg
    Posts
    1,330
    either another bad valve ...or something restricting the gas flow..... inlet pressure fine ...outlet low..... usually the valve......
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  2. #15
    Join Date
    Feb 2013
    Location
    Tri-Cities, Ontario
    Posts
    8
    yup, inlet stays at 6.6" the whole time

  3. #16
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,690
    Is there a regulator in the line that could be acting up?
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  4. #17
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,843
    Is this the customers only unit?

    Anything else on their meter?

  5. #18
    Join Date
    Aug 2012
    Location
    willowick ,oh
    Posts
    261
    does voltage to the valve stay constant

  6. #19
    Join Date
    Feb 2013
    Location
    Tri-Cities, Ontario
    Posts
    8
    Only unit on that meter, no regulator up stream, voltage stay constant.
    Talked to Lennox tech support and after a lot of talking, he thinks i have an inducer issue.
    I'm heading back there tomorrow morning, i'll post any updates.

  7. #20
    Join Date
    May 2000
    Location
    Salem, WI US
    Posts
    61
    I would check the burner orifice for an obstruction, if the manifold pressure is fluctuating this much there has to be some sort of blockage in the burner. I am assuming you replaced the gas valve.

    Beta

  8. #21
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,843
    Quote Originally Posted by Slim_Miller View Post
    Only unit on that meter, no regulator up stream, voltage stay constant.
    Talked to Lennox tech support and after a lot of talking, he thinks i have an inducer issue.
    I'm heading back there tomorrow morning, i'll post any updates.
    And you are certain that there is a steady pressure coming to the unit from the meter, right?
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  9. #22
    Join Date
    Feb 2013
    Location
    Tri-Cities, Ontario
    Posts
    8
    Quote Originally Posted by Betabass View Post
    I would check the burner orifice for an obstruction, if the manifold pressure is fluctuating this much there has to be some sort of blockage in the burner. I am assuming you replaced the gas valve.

    Beta
    You nailed it.
    Orifice was partly blocked. It was burning fine but was making my vacuum in the burner box fluctuate, making my manifold pressure go crazy. Everything is great now.
    Thanks everyone for your ideas

  10. #23
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,843
    Normally, when you have a partially blocked orifice, the flame will appear different than the other burner flames. Do you recall seeing any difference in the flame?

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