Recent content by tastyfish

Quick update (in case anyone else faces same issue) - I avoided £80-90 on a new programmer (for now) simply by switching the central heating to timer mode but to be on all day (on @midnight - off@midnight so still controlled largely by the room 'stat) but switching off and on either side of the...

Thank you Echo, yes, I think you're right, although once the HW is on both do work at the same time, so it may just be that initial connection? I'll have a look at replacing it, hopefully straightforward. Thanks once again.

Thanks for the reply. I don't have a multimeter but I can ask someone. I can't hear the click of what must be the microswitch when the HW is meant to come on, only when I force the HW with the CH off or the system switched off/back on. If I switch the HW off I then hear the whirring of the valve...

Hi. They are both Honeywell - see pic. They look the same but seem to have different model numbers - the CH is V4043H1056 and the HW is 272848

Thanks for taking the time to reply. Prog is a Horstmann Centaurplau C27. So I tried your suggestion with the CH Off and then turned the hot water in three ways: manually, on timer and with Boost. In all three cases the hot water came on (boiler on, valves on). Which is possibly mimicking in...

Hi, Odd issue here, not sure if it's a plumbing one or an electrical one. Apologies if posted in wrong forum. Background Our central heating and hot water system operates off a pair of 2-port valves controlled by a HW/CH digital programmer. The HW is programmed to switch on at certain times...