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    Valiant Ecotec 615 Plus - no hot water

    Thanks ianmcd, I will do. Re the expansion vessel - when I had the boiler last serviced, the guy showed me how to repressurize it, hence why I thought Id fixed the problem last week when we had hot water again.
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    Valiant Ecotec 615 Plus - no hot water

    We have very hot water..... Re the Honeywell cylinder zone valve - when I first checked, I was able to move the manual override freely - no resistance. Having had the boiler firing for the past 25 mins or so (its since gone off), I now feel resistance when moving to manual, at which point it...
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    Valiant Ecotec 615 Plus - no hot water

    Thanks Gasguru, for confirming my clear misunderstanding of this! :) And thanks so much for your response. Ok, so the cylinder zone valve is a Honeywell 272848 t50 brass ts88. It is very hot to touch - is that normal? The boiler is still operating - have not tested for hot water as yet... At the...
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    Valiant Ecotec 615 Plus - no hot water

    Right, bit of progress having found the Santon troubleshooting manual! Tried the classic power off/on of the Santon heater itself (had tried the boiler previously). Hit the override on the programmer and the boiler fires! Should mean we have hot water shortly... So will see how long this lasts...
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    Valiant Ecotec 615 Plus - no hot water

    Just signed up having searched for answers but not sure what difference my system has on things so... Apologies in advanced for the long post but I've tried a few things so have detailed them here.. System installed 2012 - new build - I am first owner. Valiant Ecotec 615 Plus Danfoss programmer...
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