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Mend Glow-worm F4 Boiler Error

Bmu err shown on thermostat glow worm boiler shown f4?

Bmu err shown on thermostat f4 shown on actual boiler what does this mean

Jackie
March 2014
Glow-wormGlow-worm F4Heating, Home Heating SystemsGlowworm Boiler Error

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Glow-worm 102Glow-worm 18 HXIGlow-worm 18hxiGlow-worm 24 CIGlow-worm 24 cxiGlow-worm 24cxiGlow-worm 30 CIGlow-worm 330Glow-worm 38CXIGlow-worm 45-60Glow-worm Betacom 30Glow-worm Express 100Glow-worm Fuel Saver FGlow-Worm FuelSaver MK2Glow-worm MicronGlow-worm Performa 24Glow-worm Sabre 28Glow-worm SpacesaverGlow-worm SwiftflowGlow-worm Ultimate 40FF

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