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Yep, you're probably spot on there. We're planning a loft conversion at which point I'll replace the existing system so long term we can start from the beginning, but right now I'll simply be happy if I can get the programmer/clock correctly turning the heating off and on. Cheers, Lee

Hi Tony, The heads have been removed, no sign of them or any wires. Just the valve bodies left on the pipework. Thanks, Lee

Thanks Matt. Yes, the valve is on the output of the coil. Yep, those are the centaurstats one upstairs and one downstairs, they're all wired into the wiring centre. The 3 redundant zone valves are connected as follows: What's the purpose of the single zone valve if it's not there...

Yep, no complaints there ... bar the gas bill :-)

Thanks JLMGas, I will try that. Agile, you assume correctly, I'm happy to pay someone who can resolve the issues I've been having but so far I've been unable to find someone who seems to have the design or electrical knowledge to investigate why the system was designed as it was and which...

Recently moved house and have been unable to turn off the heating. The heating system includes two centaurstats, a horstmann channelplus h27 programmer that all seem to feed into a Honeywell 42005748-001 Wiring Centre along with the pump, hot water cylinder stat and a Danfoss 2 port spring...