Recent content by Charles Victor

After several days' monitoring as described above I have found that the system is now working correctly. Other than remaking every connection in the junction box I have done nothing so can only assume that beforehand I had an open circuit somewhere. Thanks again for all the help; hugely...

Thanks for that, Echo the husky - and please excuse radio silence. I was sent abroad to work at short notice and only now am back home. The good news is that whilst I was away my wife didn't complain of a lack of HW but this might be because it is being heated when CH and HW are both being...

Thanks for that. I presume you mean circuit 13 in my photo? If so I will do as I intended anyway and split it in to two pairs of wires using 13 and 14 with a bridging wire on the opposite side of the two chocolate blocks.

No contradiction, MeldrewsMate. Statement One is when CH is the first circuit switched on. Statement Two is when CH is switched on with HW already on. Thanks to your item 2 and the crystal clear test instructions from Echo the husky I do wonder though if we are on to something. Testing...

Thank you very much indeed for that. Perfectly clear. I've switched the HW off at the programmer and will run the tests once the family have showered this evening and partially depleted the hot water. Stand by.

Many thanks. I've remade each connection several times already so if you will please be kind enough to tell me what terminals to measure (I have a voltmeter) in which combinations of HW, CH and both, I will do so. Yes, the pump runs when only CH is on, as does the boiler; the CH powerhead...

Two. The brown from the HW powerhead and a brown to the HW thermostat that can just be traced in the image; it runs parallel to and just below the brown from the HW powerhead before branching off to the right.

Thank you each for the continued assistance. I am back home a little earlier than expected so have just taken the embedded photo as promised. Note that although the installation is a pig's ear compared to how I would have done it (and it wouldn't be on the floor underneath a web of plumbing...

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Thank you, Echo the husky. I am currently out of the house but will take and post a photo this evening.

My central heating has two, 2 port valves; one for the HW and one for the CH itself. The powerhead on the HW 2 port valve is a Honeywell 40003916 that failed and on which I have fitted a replacement. The problem I now have is that the boiler only fires if the CH or CH and HW both demand...