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Mend Glowworm 30ci Combi Boiler Central Heating Operating Pressure

Glowworm combi boiler pressure rises when central heating on?

My Glowworm 30ci combi boiler has an operating pressure of 1.5 bar but when I switch on the central heating the pressure starts rising fast. Is this normal?

Holly
September 2007
GlowwormGlowworm 30ciHeating, Home Heating SystemsCombi Boiler Central Heating Operating Pressure
no

hi-spec plumbing
September 2007

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Glowworm 30ci Boiler Pressure Rising - Help!