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Mend Combi Boiler Inspection Hot Water

combi boiler making clunking noises?

hot water start to run cold on inspection can hear clunking and scraping noises inside boiler plus water pressure gage bouncing all over

welly
May 2012
Heating, Home Heating SystemsCombi Boiler Boiler Inspection Hot Water
most likely circulation pump blocked or failed

tony
May 2012
what make & model boiler do you have?
gas council number? 47-???-??
NO DHW?
does the CH work OK?
are do you get the same clunking noises when CH ON?
can you hear/feel the pump running?

manwithnoname
May 2012

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Combi Boiler Clunking? - Causes & Fixes