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Mend Glow-worm Combi Boiler (specific model not provided) No Hot Water Heating System

how to fix F1 code on glow worm?

F1 keep flashing on the display of my glow worm combi boiler. No hot water or central heating.

Pravin
November 2011
over heat cut out press reset and change NTC change both flow and return

ltd
November 2011

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