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Could it be a fault in the actuator head on the valve then? As its not a fortnight old yet then that can be exchanged easily enough

3 - 1, 3 & 4 from the programmer

All i've done is to take a system that's been here at least 10 years (cos I've been here 8) and the comment from the heating engineer (needs wiring tracing), and started from there. I get pump and boiler no problem for HW, but no boiler for CH, only pump.

Thanks for that Mandate, Between my orginal post, and now, I have moved all the connections in the Junction board twice. Once remaking all connections into the same connector block, the second moving into a new "chunkier" block. Same outcome. What I did notice, is that when I turn off...

I'm about ready to throw in the towel. Last week, woke up to a puddle downstairs, and found the pump had failed. No problem, and whilst I was fixing that, I figured i'd deal with the dodgy motorised valve. And thats where my problems began. Replaced, pump (now Wilo smart pump), and mid...