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Many thks. We have 2 valves, both Honeywell V4043H. Which seem to be the sort that are normally closed. They have switches that have "auto" selected, rather than the "open" option. One valve is on a pipe that goes into the hot water cylinder half way up, the other one is on a pipe that the...

We have a Drayton LP522 dual channel programmer that controls Hot water and Central Heating. This has worked fine for many years, but in the last week it does not turn off the pump, boiler etc, when the "off" time is reached. So at 22:00 when CH is meant to stop, it goes on thro' the night. OK...