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Mend Potterton Puma Combi

Hissing and banging?

Potterton Puma 100E combi wall hung, Heating works fine no problem, on hot water start up boiler hisses then bangs, this happens for 20-30 seconds then settles down water then heats up no problem, is it a problem with expansion vessel.

Joe Harwood
November 2006
sounds like heat exchanger scaled up.

hi-spec plumbing
November 2006
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Mend D.I.Y, Plumbing
Free repair help for Potterton plumbing