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Mend Worcester Bosch 28CDI Boiler Pressure Drop

banging boiler?

I'm having a mare with my worcester 28cdi. When we call for hot water, it fires up fine. But after a minute it starts banging and rattling, it then cuts out. the pressure also drops.
Any ideas.

Craig
March 2008

Worcester Bosch Worcester Bosch 28CDI Heating, Home Heating Systems Boiler Pressure Drop Worcester

that will be a blocked plate heat exchanger ... engineer will be req

matt the boiler man
March 2008

could be the pump,but the same would happen when you put the heating on ?

combiking
March 2008

sounds like the heat exchager could be cloged up possibly a descale

richie
March 2008

could be air in the heat exchanger
or the water is'nt cirulating fast enough

b
March 2008

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Worcester 28CDI Boiler Banging - Help!