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Worcester 350 combi boiler. CH cutting out, HW OK. Fan? Pump? Something else?

Discussion in 'Plumbing and Central Heating' started by nv_london, 20 Jan 2016.

  1. St0rmer66

    St0rmer66

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    Fan is obsolete on these too. I've had 2 just recently who've had to replace the boiler because of a duff fan. One just before Christmas!
     
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  3. nv_london

    nv_london

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    Thanks , ollski - and I'll try taking a look at the instruction manual.

    What I'm slightly struggling to understand is, why the CH *seems* to work once the hot water (and hence, the boiler) has been running for a few minutes?!? (It surely can't be coincidence, and equally, can it really be related to the speed resistor and air pressure switch?).

    (Thanks, St)rmer66, I know, the majority of parts are now obsolete!)
     
    Last edited by a moderator: 21 Jan 2016
  4. nv_london

    nv_london

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    Tony, your posts are slightly distracting.

    Now, I know you're a (self-proclaimed) 'expert/professional/boiler guru' and that you've, apparently, extensively worked on Worcester 350s in your time (if I'm not mistaken, I believe the last time was 'just before Christmas' - I assume Christmas 2015?) and, as you say, you've been commenting on them for at least the last 9 years) then it really surprises me that you don't think/know/realise that the 350 does indeed have a fan speed resistor and two PCBs as ollski mentioned (at least according to Google...oh, and the one in my kitchen)

    https://hecas.co.uk/fan-speed-resistor?cat=185629
    http://www.heatsparesdirect.co.uk/worcester-350-pcb-zagas-125-pc639.html
    http://www.heatsparesdirect.co.uk/worcester-350-ignition-pcb-zagas-126-pc613.html

    Maybe site management should delete your posts instead of ollski's? As he seems to be speaking way more sense than you (and, by the way, he didn't advise anybody doing any work he just said 'if he was the gas safe man inspecting my boiler he would start with those parts'). By the way, I hope not all (ex)professionals are like you - you're giving them a very bad name!

    By the way, thank you very much ollski...I'll get that manual...
     
  5. Agile

    Agile

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    There were several different models of the 350.

    I had expected that you had the two pump version which is the one that I went to a few weeks ago. You mentioned two pumps although its not always clear if you are describing your boiler or something you have seen on Google. The one I went to only had one PCB and an electronic pilot light.

    I have not been to your house and so I cannot be expected to know exactly which version you have. I have to rely on only what you have written.

    So we now learn that yours is an earlier permanent pilot model.

    However, my view is still the same that your boiler is old and not economically sensible to repair.

    I also don't want to encourage you to attempt the DIY repairs which you seen hell bent on doing!

    In view of your negativity I am inclined to delete my previous replies to you in case any of them encourages you to continue with your attempts to do DIY repairs on parts of your boiler you should not be accessing.

    Tony
     
  6. Agile

    Agile

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    I am pleased to hear that as I have a new fan for a single pump version which I bought on spec after I got one going by lubricating it and wanted to be ready for when it failed.

    Either my lubrication was too effective and its not failed or he has moved somewhere else as its an area where people rarely stay very long.

    Sounds like my new fan is appreciating!

    I also have a used fan from a two pump version too.

    Even went to a Worcester 240 with no fan this week!

    Tony
     
  7. ollski

    ollski

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    I'd be genuinely interested to see a single pump / single board version of the 350 as I have never seen one and we have had every model from the prototypes for the worcester staff to the last ones round here. Even the short lived diverter versions of the boiler were twin pumped. A 350 is what it is because of the moulded waterways in the backplate so to make it single pump would be impossible as far as i can see.......well unless you called it a 9.24......or a 280!
     
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  8. St0rmer66

    St0rmer66

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    Maybe he's thinking of a 35CDi?
     
  9. Agile

    Agile

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    Perhaps there was no single pump version of the 350.

    But there certainly was a single PCB 350 with electronic ignition!
     
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  11. ollski

    ollski

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    Photos Tony, or it didnt happen.
     
  12. Agile

    Agile

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    Photo of what?

    You don't know the twin pump 350 with single PCB and electronic ignition?
     
  13. ollski

    ollski

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    No, as st0rmer said 35cdi?
     
    Last edited: 21 Jan 2016
  14. Steelmasons

    Steelmasons

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    Well.....I guess it would suit you to delete your posts due to mis-informing the OP.....

    You couldn't make it up Tony..:ROFLMAO:

    You have an air of authority in all of your postings...are you the same Tony that askes for advise in the combustion chamber?...basic questions @ that.:censored:
     
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  15. DP

    DP

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    There is only one WB 350 AFAIK
    Tony I feel education coming on, can you elucidate:oops:

    Also has two PCBs. Reason why I know is I fitted this boiler for client and have repaired it over time, replacing left and the right PCB

    Has two pumps

    Has a fan resistor too

    No standing pilot- or pilot assembly.
     
    Last edited: 21 Jan 2016
  16. Agile

    Agile

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    So what is the fan resistor for then Danny?

    They are normally used on PP boilers so the fan runs slowly to evacuate the POC from the pilot when the boiler is not running.

    Tony
     
    Last edited: 22 Jan 2016
  17. DP

    DP

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    The fan runs at two speeds
    This function is used during ignition sequence.
     
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