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    Glowworm 30SXI burner modulating before reaching temp

    We have a 30SXi that a local engineer cant seem to get to the bottom of a strange issue we have, its not a problem as such, but is not working as it used to! When the boiler fires up from cold (on CH or HW) the burner goes to full power and the temp on the panel starts to rise as expected...
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    Glow Worm 30SXI strange problem

    I have a 10 year old Glowworm 30SXI that has a strange intermittent problem. Basically when the timer calls for heat the pump starts and then nothing else. The display has the current water temp (low or ambient) then it just sits there until the power is cycled off and on, then it fires and...
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