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Mend Worcester 20/25 0IL COMBI Boiler Heating Pressure

How can l resolve problem?

WORCESTER HEATSLAVE 20/25 0IL COMBI

Water pressure drops and will not rise, pump starts to make noise. To keep boiler working need to top up with cold water feed. I have installed new expansion tank, but makes no difference. Any ideas?

Kev Ebbins
October 2010

Worcester Worcester 20/25 0IL COMBI Heating, Home Heating Systems Boiler Heating Pressure

Either the prv is passing or you have a major system leak.

Carefree
October 2010

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Worcester 20/25 Oil Combi Boiler - Low Pressure