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BAXI 105 HE intermittent problem

Discussion in 'Plumbing and Central Heating' started by Hamil3905, 12 Feb 2011.

  1. Hamil3905

    Hamil3905

    Joined:
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    Location:
    Tyne and Wear
    Country:
    United Kingdom
    Hi Guys if anyone could help me you would save me getting a new boiler…
    Ok well this is a intermittent problem with the boiler some times it runs ok and sometimes it doesn’t
    When it is not working the problem is that the hot water runs as normal getting to a hot temperature but all of a sudden the flame cuts out and then fires straight up again within seconds; however this will produce around 20 seconds of cold water through the outlet (bath tap, shower or kitchen tap etc) before it then starts to warm up again! At first this seemed to happen when it reached to the 70 degrees mark but now happening more and more at different temps.
    I have noticed this also happening to the central heating to but this does not effect it as the rads still get well hot!

    Has anyone had this problem or has anyone ever fixed this problem

    A friend (who is a heating engineer for 4 years) has tried a number of things for me free of charge like… heat sensors, cleaned heat ex, checked condense trap, replaced pump all to no avail

    Please help I don’t want this to cost me thousands or even hundreds and then still not have it fixed and have to buy a new boiler after all!?!?!?

    I have upload my problem to you tube search for “Baxi105HE problem”
     
  2. combispecialist

    combispecialist

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    faulty differential valve behind the hw flow valve.the springs in these seize up
     
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  4. Hamil3905

    Hamil3905

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    Thanks for a quick reply on ascale of 1-100 how sure are you as if ya right this could save me alot of money!?!?!? Oh and 100 being certain!!
    Thanks again ya could be a life saver as wife is 34 weeks pregnant and ready to rip boiler from wall!! Haha
     
  5. Hamil3905

    Hamil3905

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    Ps do you have a idea how easy this is to change for a qualified person and how much!! The more I think of your reply being right the more I like you a lot haha
     
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  7. namsag

    namsag

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    Has he checked the high and low gas pressures as this can cause it to happen
     
  8. DIYnot Local

    DIYnot Local

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