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Danesmoor 15/19 Boiler Lockout

Discussion in 'Plumbing and Central Heating' started by mutley123, 12 Dec 2010.

  1. mutley123

    mutley123

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    Hi Guys

    We have an elderly Worcester Danesmoor 15/19 oil fired boiler in our new house.

    Had the boiler serviced recently, no problems reported.

    Boiler has recently started locking out. It runs fine for an hour or so then locks out. Once reset it runs fine again.

    Photocell is clean. Any ideas what else I could try? Have read elsewhere it might be the solenoid coil - does that sound like an explaination for this case? Or the motor capacitor?

    Thanks
     
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  3. Terrywookfit

    Terrywookfit

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    The coil would be a good starting point.
    The only way to be sure is to measure its resistance when it locks out.

    You can also do the trial and error way.
     
  4. mutley123

    mutley123

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    Thanks - what should the resistance be?
     
  5. snb

    snb

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    you can order a new coil from hwos.co.uk for about £12
     
  6. mutley123

    mutley123

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    Thanks guys, have ordered a new coil.

    Was in the room when the boiler locked out this time. It buzzed for a few seconds before locking out (nothing appeared to run) - is that consistent with a solenoid coil fault?

    Thanks
     
  7. crockett

    crockett

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    Why not get the service engineer back to fix your fault? Simple answer I know, but sometimes, unless you know what you're doing, more problems can be created. Burners have only a few parts to them, but from your explanation it could be solenoid coil, the solenoid on the pump itself, a dirty filter on the oil line, and, from your last post, it could be a jammed motor (bearing failure), a cracked connecting dog, one of the electrode cables breaking down on reignition.......... lots of other potential faults. All need to be eliminated first.
     
  8. mutley123

    mutley123

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    .... because this is a DIY forum!!
     
  9. Tibbot

    Tibbot

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    No, it's consistent with a pump tight spot.
     
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  11. crockett

    crockett

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    Fair point, doesn't make a DIYer an expert though. Just giving you a heads -up, there can be lots of other faults, but then if you knew what you were doing you wouldn't need to ask.
    Unfortunately the 'professionals' do sometimes need to be called in, even if it does cost more. But do crack on if you feel confident enough ;)
     
  12. mutley123

    mutley123

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    Thanks guys.

    I'll blow my money on the solenoid then get an engineer in if that doesn't work!

    :oops:
     
  13. djsarge1973

    djsarge1973

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    IF there was a "buzzing" noise after lock-out it sounds like a tight spot on the pump OR a bearing wearing, but try the capacitor first, failing that then get a decent engineer in & YES this is a D.I.Y forum HOWEVER there are certain things on ANY boiler that should just be left to the professionals, that is why we spend a small fortune on our qualifications.
     
  14. mutley123

    mutley123

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    Thanks.

    Solenoid didn't do the trick, so capacitor is next on the list.

    At that point I will give up and get someone who knows what they are doing ....
     
  15. djsarge1973

    djsarge1973

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    the capacitor may give you false hope as it may seem like its working o.k for awhile...personally I'd call the engineer in..it's getting close to christmas & you dont want it breaking down over that period & having to remortgage the house for a new oil pump!!!!
     
  16. mutley123

    mutley123

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    Capacitor replaced, all working OK now. We'll have to wait and see whether it's a permanent fix or "false hope" ......
     
  17. spuddie

    spuddie

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    hi , how did you get on with replacing capacitor as mine doing exactly the same thing
     
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