Page 2 of 3 FirstFirst 123 LastLast
Results 14 to 26 of 29
  1. #14
    Join Date
    Sep 2007
    Location
    State College, PA
    Posts
    2,908
    Post Likes
    Quote Originally Posted by Jeffrey F View Post
    Not sure what to add 230 volts to unit 24.7 volts from Lv transformer, 0 volts across pressure switch everything appears to be running fine but random flash of spark is all I get and never has a fault code or goes into soft lock out. Just acts like normal except nothing to ignite the gas.
    Are you sure you have 230 volts on a gas furnace? never saw a 230 volt furnace, but first time for everything. Not trying to invalidate you.

    This is something I ran into and could be your issue. Check polarity. That is why i question the 230 volts. Gas furnaces are polarity sensitive. Who knows what a power outage could do. But you never know.

    Get your post count up to 15 and apply for pro membership and get to the good stuff.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


    Please view site rules: http://hvac-talk.com/vbb/showthread.php?t=1241

    Apply for Pro Membership: http://hvac-talk.com/vbb/showthread.php?t=116113

    Find your local HVAC-Talk Contractor: http://hvac-talk.com/aop

  2. #15
    Join Date
    Jan 2004
    Location
    PA
    Posts
    78,340
    Post Likes
    Quote Originally Posted by joemach View Post
    Are you sure you have 230 volts on a gas furnace? never saw a 230 volt furnace, but first time for everything. Not trying to invalidate you.

    This is something I ran into and could be your issue. Check polarity. That is why i question the 230 volts. Gas furnaces are polarity sensitive. Who knows what a power outage could do. But you never know.

    Get your post count up to 15 and apply for pro membership and get to the good stuff.
    He said gas package unit. So it would make sense that its 230 volt.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  3. #16
    Join Date
    May 2019
    Location
    Knoxville, Tennessee
    Posts
    13
    Post Likes
    Thread Starter
    Quote Originally Posted by joemach View Post
    Are you sure you have 230 volts on a gas furnace? never saw a 230 volt furnace, but first time for everything. Not trying to invalidate you.

    This is something I ran into and could be your issue. Check polarity. That is why i question the 230 volts. Gas furnaces are polarity sensitive. Who knows what a power outage could do. But you never know.

    Get your post count up to 15 and apply for pro membership and get to the good stuff.
    The unit is a Goodman gas package unit not a furnace

  4. #17
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    32,064
    Post Likes
    You need to make sure that you're meeting all of the board's input requirements before the board will reward you with lighting off the gas.

    Are you smelling gas when it does not fire, or is it not even opening up the gas valve?

    These questions will become natural to you as you begin working on these pieces of equipment... so first you want to go to the diagram and look at the various inputs which are going to need to be in the correct state at the correct time in order to allow the board to make fire. This means that your safety chains have to be complete. It also means that most of the time the board will look to make sure that the pressure switch is open before it allows the inducer to run, so that it closes when the inducer runs. This tells the board that the switch is not stuck in one position or the other.

    So.... the switch has to change state at the onset of the inducer spinning.

    Make sure all your inputs are correct... and since the board is new, I am guessing you're going to find that one of the inputs is not correct and that's what's keeping you from lighting off gas.

    I'm just curious to know if you have smelled gas during the trials for ignition.... because if the board is not opening the gas valve or generating a spark, it generally means that those conditions have not yet been met.








    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  5. #18
    Join Date
    Mar 2018
    Location
    Kansas Flatlands
    Posts
    386
    Post Likes
    As timebuilder said, sometimes things like rollout switches ohm out or read voltage thru them but it just ain't there. Go that direction, troubleshoot and solve. BTW, after you find it you'll never forget that one again.

  6. #19
    Join Date
    Sep 2007
    Location
    State College, PA
    Posts
    2,908
    Post Likes
    Quote Originally Posted by beenthere View Post
    He said gas package unit. So it would make sense that its 230 volt.
    OOPS! Sorry I missed gas pac. Was thinking furnace.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


    Please view site rules: http://hvac-talk.com/vbb/showthread.php?t=1241

    Apply for Pro Membership: http://hvac-talk.com/vbb/showthread.php?t=116113

    Find your local HVAC-Talk Contractor: http://hvac-talk.com/aop

  7. #20
    Join Date
    May 2019
    Location
    Knoxville, Tennessee
    Posts
    13
    Post Likes
    Thread Starter
    The problem is the same as before the board was replaced so I feel pretty confident that everything is plugged in the right place. I am 2nd guessing myself on whether gas valve is opening up or not have been so focused on not sparking. I have checked the safeties and have made sure pressure switch is opening and closing as it should and have watched on meter it allowing voltage to pass through. I hear relays clicking on both old board and new one that is why I suspected defective board. I am going in for testing in the morning to rule out cancer so I admit my head may not be100% in the game right now, that is why I appreciate all the help here. I am only service guy so if I fail these people have no heat but no pressure on me right now!!!

  8. #21
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    25,725
    Post Likes
    Quote Originally Posted by Jeffrey F View Post
    The problem is the same as before the board was replaced so I feel pretty confident that everything is plugged in the right place. I am 2nd guessing myself on whether gas valve is opening up or not have been so focused on not sparking. I have checked the safeties and have made sure pressure switch is opening and closing as it should and have watched on meter it allowing voltage to pass through. I hear relays clicking on both old board and new one that is why I suspected defective board. I am going in for testing in the morning to rule out cancer so I admit my head may not be100% in the game right now, that is why I appreciate all the help here. I am only service guy so if I fail these people have no heat but no pressure on me right now!!!
    Screw the unit, and the people...…..Take care of your self first!

  9. #22
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    32,064
    Post Likes
    Well, I hope for a good outcome at the Doc, but really, the big C is not as dangerous as it once was. Today, we are enhancing our own cells to fight it. We will completely conquer it in my lifetime.

    As for the problem with the unit...when you go back, make sure the gas valve receives a voltage, and that the pressure on the manifold increases at the same time. Check AT the board for the return of all safety chains, and allow for whatever delays are a part of the setup.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  10. #23
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    32,064
    Post Likes
    Quote Originally Posted by pecmsg View Post
    Screw the unit, and the people...…..Take care of your self first!

    Take care of yourself, then take care of your responsibilities. Serving others is good for you.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  11. #24
    Join Date
    May 2019
    Location
    Knoxville, Tennessee
    Posts
    13
    Post Likes
    Thread Starter
    Thank you all so much for the encouraging words about the test tomorrow it seems like the more you try not to think about it the more it comes up. I have always said there will be time to worry when there is something to worry about so staying positive for now.

    ***Update on the no spark issue:***
    I went back today with all the advise I have been given and rechecked unit and I found that the gas valve solenoid was shorted out I found that when I unplug the wires it started to spark normally so installed new gas valve and now everything is working fine.

  12. #25
    Join Date
    Sep 2007
    Location
    State College, PA
    Posts
    2,908
    Post Likes
    Quote Originally Posted by Jeffrey F View Post
    Thank you all so much for the encouraging words about the test tomorrow it seems like the more you try not to think about it the more it comes up. I have always said there will be time to worry when there is something to worry about so staying positive for now.

    ***Update on the no spark issue:***
    I went back today with all the advise I have been given and rechecked unit and I found that the gas valve solenoid was shorted out I found that when I unplug the wires it started to spark normally so installed new gas valve and now everything is working fine.
    Take care of YOU first. Good luck with the doc.

    Glad you got it going. Good job. Some calls are more fun than others.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


    Please view site rules: http://hvac-talk.com/vbb/showthread.php?t=1241

    Apply for Pro Membership: http://hvac-talk.com/vbb/showthread.php?t=116113

    Find your local HVAC-Talk Contractor: http://hvac-talk.com/aop

  13. #26
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    6,666
    Post Likes
    Quote Originally Posted by Jeffrey F View Post

    ***Update on the no spark issue:***
    I went back today with all the advise I have been given and rechecked unit and I found that the gas valve solenoid was shorted out I found that when I unplug the wires it started to spark normally so installed new gas valve and now everything is working fine.
    oh wow that was a tough one to locate

    sometimes you get a curve ball thrown atcha ...

Page 2 of 3 FirstFirst 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •