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Has anyone ever seen this inside a heat exchanger?

Discussion in 'Plumbing and Central Heating' started by benjiman, 13 Mar 2020.

  1. benjiman

    benjiman

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    Is this what scale looks like inside a heat exchanger?

    This system had a magna clean fitted. What would cause this kind of buildup? Looks like expanding foam!
     

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  3. ianmcd

    ianmcd

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    nothing to do with a magna clean, looks like water ingress from the flue contaminating the insulation panel, is it a Vaillant ? have seen similar on a Viessmann
     
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  4. benjiman

    benjiman

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    Oh right. Yeh it is a Vaillant boiler. Incorrectly installed flue possibly causing this? Is it worth repairing? Have been advised need a new boiler!
     
  5. ianmcd

    ianmcd

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    You need to sort the flue out before looking at a new boiler
     
  6. DP

    DP

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    Perhaps condensate blocked?
     
  7. ianmcd

    ianmcd

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    easily enough to fix , but you need to find the cause first, doubt if it is the condensate but anything is possible, I would be checking the flue first
     
  8. BoilerBob

    BoilerBob

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    You get this in an oil boiler sometimes I think it’s sulphur which is in all fuels
    that xyz stuff mixed well gets rid of it never seen it in a gas boiler though. Bob
     
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