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    Glowworm boiler - keeps tripping showing F5, F9 or F11

    It appears the issue is with the heat exchanger which needs replacing - so, although a boiler ought to do more than 8 years, given the cost of repair it seems most sensible to go for a new boiler since this isn't the first issue I've had with it in the 3.5 years since moving house.
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    Glowworm boiler - keeps tripping showing F5, F9 or F11

    Thanks - are those likely to be expensive? (which probably means over £100 to me when thinking about boiler repairs!) The boiler is under 8 years old but has been temperamental since we moved in around 4 years ago. Almost changed it just under 2 years ago when local plumbers said it couldn't...
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    Glowworm boiler - keeps tripping showing F5, F9 or F11

    I have a Glow worm Ultrapower sxi boiler. Over the past 24 hours, it has kept stopping and showing fault code F5, F9 or F11. If I then reset it via the reset button, it starts working again for a short period (and will heat water in that period, eg I've had a hot shower, or the central heating...
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