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  1. #1
    Join Date
    Oct 2006
    Posts
    4
    * 6 year old Weil Mclain Model A/B WGO -4 Series 3.
    * Regular maintainance every fall since installation

    Problem:
    Over the past two years the system has failed to start on a 5 separate occasions when the temperature has fallen below thermostat setting. As I have an annual maintenance agreement my oil company comes and checks each time. During this period at least 4 separate technicians have been sent to look at the system -performing filter and nozzle check and other things they do that seem similar to the regular tune ups. System will work fine for several months and then problem will occur again.

    Questions:
    1. Is there a known defect with this unit that could be causing this problem?
    2. Does Weil Mclein have troubleshooting resource (other than call local service tech)?
    3. Could there be something external to the system that could be causing this problem (i.e. chimney problem) that I should have looked at in addition to unit?

    Thanks for any help in attempting to determine my next steps.

  2. #2
    Join Date
    May 2006
    Location
    Philadelphia, PA
    Posts
    1,398
    When they come out what did they find to be the problem?
    Climate Control Solutions for your Home or Office

    Serving Northeast Philadelphia and Surrounding Areas

  3. #3
    Join Date
    Oct 2006
    Posts
    4
    That is just it - they do not find any real problem. All re-did tune up. One also replaced a release valve and tested the pressure on the line from oil tank to burner. Other that that they got it working and left. Never able to identify any significant problem.

  4. #4
    Join Date
    Sep 2002
    Posts
    3,708
    If the problems not flame failure do to too much air or sludge nozzle then have them replace the burner relay.

    I seem a few of weils burner control not make contact when there a call for demand.The contact get pitted and will not bring on the burner.However alittle tap on the burner control will cause it to come on.

    This type of problem will have the best in the trade staching their head.So callback are a coming.

    If I get a call on a weils and everything else checkout ok
    then the burner control is replace.


  5. #5
    Join Date
    May 2006
    Location
    Philadelphia, PA
    Posts
    1,398
    How old is the oil tank?
    Where is the tank - inside, outside, above or below burner etc?
    How long is oil line? One pipe from tank to burner or two?
    Oil line at tank come off bottom valve or out of top?
    Flare or compression fittings on oil lines?

    If the chimney has not been inspected and/or cleaned in several years you should have a reputable chimney contractor check it. It's a safety issue and probably not contributing to the burner issue.
    Climate Control Solutions for your Home or Office

    Serving Northeast Philadelphia and Surrounding Areas

  6. #6
    Join Date
    Nov 2004
    Location
    NJ, Monmouth County
    Posts
    80
    Do they re-clean it cause its plugged?
    The More You Know, The More You Can Get In Trouble For!!!!

  7. #7
    Join Date
    Oct 2006
    Posts
    4
    How old is the oil tank?
    >> 26 years

    Where is the tank - inside, outside, above or below burner etc?
    >> Inside - opposite end of basement from burner. Oil line runs under concrete floor.

    How long is oil line? One pipe from tank to burner or two?
    >> about 25 feet - one pipe

    Oil line at tank come off bottom valve or out of top?
    >> bottom valve

    Flare or compression fittings on oil lines?
    >> don't know the difference?

  8. #8
    Join Date
    Apr 2004
    Location
    Maryland
    Posts
    522
    This could be lots of things. If the nozzles and filters keep getting sludged up causing these problems I would try to make the tank a top feed to keep the feed line out of the tank sludge and install a high quality oil filter like a Garber or similar. Does the red reset button trip on the burner causing it to lock out. Alot of times nuisance call backs and lock outs are caused by weak/poor spark from the ignition transformer. But not being there all this is just speculation.

  9. #9
    Join Date
    Mar 2004
    Location
    Grottoes VA
    Posts
    5,856
    I had two boilers in the last week that were installed by a local hack. Found the combustion air band was set to 6 with a .85 nozzle. Reset to zero after the Bacharach test was performed. The burner would not light off after it was cleaned with the high air band setting.


    Point is did they do a combustion test on the burner?
    Karst means cave. So, I search for caves.

  10. #10
    Join Date
    Sep 2006
    Posts
    45
    Did you have to hit the reset button? Did the burner motor run for 45 sec. and then cutout? Is it a package boiler/burner or a knockdown? What is the name of burner?

    If you are having clogged fuel nozzles have oil tank cleaned. Add biocide to tank and make sure there is no water present.

    Perform nozzle tests with different spray angles and test with combustion analyzer for optimum combustion.

    Check gap on electrodes. Use ohmmeter to determine cad cell resistance with flame on.

    Put a riello Burner in and forgetabout it!

  11. #11
    Join Date
    Sep 2002
    Posts
    3,708
    Originally posted by karsthuntr
    I had two boilers in the last week that were installed by a local hack. Found the combustion air band was set to 6 with a .85 nozzle. Reset to zero after the Bacharach test was performed. The burner would not light off after it was cleaned with the high air band setting.
    It happen in your part of the state too?

  12. #12
    Join Date
    Mar 2004
    Location
    Grottoes VA
    Posts
    5,856
    Unfortunately
    Karst means cave. So, I search for caves.

  13. #13
    Join Date
    May 2006
    Location
    Philadelphia, PA
    Posts
    1,398
    Originally posted by whitcam
    [BQuestions:
    1. Is there a known defect with this unit that could be causing this problem?
    2. Does Weil Mclein have troubleshooting resource (other than call local service tech)?
    3. Could there be something external to the system that could be causing this problem (i.e. chimney problem) that I should have looked at in addition to unit?

    Thanks for any help in attempting to determine my next steps.
    [/B]
    1) Given the info provided so far it does not seem to be a defect with the unit that would point to a problem with the manufacturer. As you read this post you see almost everyone has something different they would look at first as the cause of your trouble, but none are looking at engineering issues with the boiler.

    2 & 3) Weil McLain does have regional tech reps, but I think the service contractor must initiate the request for help. In your situation I would strongly insist the service contractor send a supervisor to help a tech diagnose the system. From the oil fill pipe out to the chimney the system needs to be evaluated. Insist it be done now, not wait to see if there will be another failure. If you wait it will be cold and all they will want to do is get the heat going and return later to look further for the problem.

    There are many things that could be causing intermittent burner failures. I would look at oil delivery first and probably run dual oil pipes from the top if the tank if I saw anything that seemed at all not normal. Properly clean the boiler and setup the combustion would follow.

    [Edited by comfortdoc on 10-26-2006 at 08:36 PM]
    Climate Control Solutions for your Home or Office

    Serving Northeast Philadelphia and Surrounding Areas

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