Weil mclain boiler not lighting

Discussion in 'HVAC Heating & Cooling' started by shluffer, Nov 22, 2008.

  1. shluffer

    shluffer New Member

    Messages:
    81
    Location:
    Connecticut
    I have a weil mclain gold boiler (hydronic heat). The boiler cycles on with the thermostat but it does not light. I loosened the bleeder valve to confirm that oil was flowing and it is. This is the first time I started it up for the year. It was working at the end of last year. Anything I can check before I call the service guy? I won't be able to get him here until Monday and its cold. Any help would be appreciated.
  2. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    Did you press the re-set button? Only once please.
  3. shluffer

    shluffer New Member

    Messages:
    81
    Location:
    Connecticut
    Yes. Only once. I have convinced myself that it is either the igniter or nozzle. I pulled the nozzle out. I would prefer to replace it, but nothing is open over the weekend so I am going to try and clean it. I tried to blow through it but can't. I'm told that means it is clogged, but I'm not sure.
    Last edited: Nov 22, 2008
  4. shluffer

    shluffer New Member

    Messages:
    81
    Location:
    Connecticut
    I cleaned it out and put it back together. The boiler still doesn't light. I figure there are only three possibilities left as to what can be wrong with it. Either the tip is still clogged, the solenoid isn't opening the valve to let oil through, or the igniter is done. I figure I should first get myself a new tip, and if that doesn't work, replace the igniter. Any thoughts?
  5. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    It's near impossible to clean a nozzle and have it work.
  6. shluffer

    shluffer New Member

    Messages:
    81
    Location:
    Connecticut
    I'll buy one and replace it. is there a way to test an igniter? I would like to know if I have an issue with it so that I can try and fix it tomorrow.
  7. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    10,000 vdc across both terminals, or 5,000 vdc each terminal.
  8. shluffer

    shluffer New Member

    Messages:
    81
    Location:
    Connecticut
    I purchased the new one and will install it tonight. If there is atomized oil in the boiler (there shouldn't be if it was clogged, and if it wasn't it won't light), how long would it take for it to settle / clear? My boiler guy said to light it and shut it off to let it burn out. I prefer to be overcautious. Is his advice good?
  9. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    Yep..........
  10. shluffer

    shluffer New Member

    Messages:
    81
    Location:
    Connecticut
    The heat is up and running. Had to bleed it a bunch, but then it started up. Thanks for the help.
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