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    Fault on Danfoss mid-position valve

    I have an interesting fault on my Danfoss mid-position 3 port valve. If the valve starts unactivated (DHW position) and there's a call for CH only, then it works every time. So the actuator moves through its full extent and both internal switches work faultlessly. But if the valve starts from...
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    Faulty modulation on Greenstar 18ri boiler

    Hi I think the modulation on my Greenstar 18ri boiler is faulty. On very cold mornings the boiler naturally reaches a higher than usual temperature during the initial warm up period. Then the boiler shuts off even when there is still demand (no fault is shown). I can make the boiler start...
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    Backflow from cylinder to central heating boiler

    My central heating boiler is close to my hot water cylinder and above it. Consequently there is a gravitational flow from the coiled pipe inside the cylinder back up to the boiler. This occurs when the pump turns off. The result is that the water in the lower part of my cylinder cools down...
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    Repair a small section of silicone seal

    I sealed between some solid wood worktops and the wall with silicone sealant. Unfortunately some water has penetrated the wood in one place and gone underneath the silicone seal. I think I need to remove the seal at this place. Then I can sand and oil the wood better, and apply some more...
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    Roof vent for extractor fan - how far from my soil stack?

    I am installing an in-line extractor fan in my bathroom and it would be convenient to vent it through the roof. How far does the roof vent need to be from the top of my soil stack?
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    Floor varnish peeling off

    We varnished our kitchen and bathroom floors twenty years ago and recoated them with solvent-based varnish every five years or so since. We never had any problems until now! Last year we couldn't find any solvent-based floor varnish, so we recoated with a water-based one instead. Now we...
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    Does my central heating cycle on and off too quickly?

    After my central heating settles down it cycles on and off and on again every 9 minutes or so. Is this normal or is it much too frequent? Will it shorten the life of my boiler?
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    Odd behaviour with Greenstar Ri boiler

    My Greenstar Ri boiler works well generally but it behaves oddly in two ways. When it is just heating the DHW it goes into over-temperature shut-down when the demand stops. This is okay because the boiler cannot modulate low enough so the water is almost bound to go over-temperature...
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