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Mend Glow-worm 30CI Glowworm Boiler Fault

what is an f9 fault on my boiler?

when i run the hot water the boiler flashed f9 fault its a glow worm 30ci boiler

ronnie
December 2010
Glow-wormGlow-worm 30CIHeating, Home Heating SystemsGlowworm Boiler Fault
water pressure sensor fault

gareth
December 2010
Water pressure sensor fault

a
December 2010

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Glow-worm 30CI F9 Fault - Causes & Fixes