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Mend Worcester 28 CDI Combi Boiler Central Heating Pressure Relief Valve

worcester 28 cdi c/h pressure prob?

hi i have a 28 cdi worcester combi. on the c/h side ...pressuer build-up after 10 min or so .rises from 1 bar to 3+ bar then of course pressure valve lets out side.
any help with this expansion problem? thanks...

alex.
August 2007

Worcester Worcester 28 CDI Heating, Home Heating Systems Combi Boiler Central Heating Pressure Relief Valve

thanks was low pressure in vessel,,, so far holding at 1 bar
thanks again///

alex
August 2007

pressure at o bar after heating is off . re fill to 1 bar heating back on then pressure up to ,3+ bar the valve lets again back to 0 bar ????

alex
August 2007

if pressure go's back down when heating is off then your expanssion vessel is low on pressure or is split.

hi-spec plumbing
August 2007

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Worcester 28 CDI Pressure Issue - Help!