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Mend Glow-worm 30ci F4 Combi Boiler

F1 and F4 error on Glow worm 30ci combi boiler?

My glow worm 30 ci combi has been regularly shutting down overnight and showing F1 in the LCD display. I can get it going again by switching it off and back on again but this morning when switching it back on, it showed an F4 error code - is this something serious?

duffers28
March 2011
Glow-wormGlow-worm 30ciHeating, Home Heating SystemsF4 Combi Boiler

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