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Mend Vaillant VCWGB221 Combi Leaking

Leaky DHW Heat Exhanger - Vaillant Combi VCWGB221?

DHW HE (Black plastic) is leaking from LH side of the boiler.
What effect this leak will have on boilers performance?
Any advice/comment appreciated
Thanks in advance

camy
January 2009

Vaillant Vaillant VCWGB221 Heating, Home Heating Systems Vaillant Combi Leaking

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Vaillant VCWGB221 Leaky DHW Heat Exchanger