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error code f4

  1. N

    Boiler help needed, I think I'm being taken for a ride :(

    I'm hoping someone can help with my issue please. Our 10 year old, regularly serviced, Glow Worm condensing combi boiler has recently started showing error F4 or F1 intermittently. Some days it works all day then another day I get an error code and have to turn the boiler off and back on again...
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