Don asked ... Find the charger or how to convert the battery?    |    Tanzania asked ... How can i mend my sanyo fwbp505f q?    |    Mark Goodwin asked ... Mount field 725m ride on mower?    |    Joan Sorrentino asked ... Barcalounger issue?    |    David asked ... Not starting until I bang door closed?    |    Click here to ask your question

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
link Click here to see other fixes for Potterton.