Recent content by jimblywee

Well after all that... I abandoned the entire situation and spent New Year's Eve at my girlfriend's house where the heating and hot water are fine. When I got home this morning the house was cold so I cranked on the full-blast heating. It was fine for about 2 hours, but then the whole system...

Yes, that is correct. Sorry for being unclear, and thanks very much for persisting with me! Here's what I did: I turned the power off at the mains. The thermostat (it's battery powered so was still functional) was connected but set to "off" - i.e. an open circuit across terminals A and B. I...

I've posted my circuit schematic below in case it's any help. The wiring is circa 1980s and is a bit of a dog's breakfast, but this is as logical as I can get it...

Yes, it behaves the same whether the main power is on or off. I have a Honeywell CM907 digital timed thermostat. Live is connected to terminal A, and Switch Live is connected to terminal B. Terminal C is not connected. When the thermostat clicks on, it completes the circuit between terminals A...

Thanks for your replies! Yes, it's the very old version unfortunately. Is there a manual override I can perform with a screwdriver or something? The lever does nothing: it doesn't seem to be connected to anything in the valve unit any more. What I mean about the resistance is: 1. There...

Hi all, hoping you can help. I was away on Xmas hols for the last week, and when I got back the house was an astonishing 28.5C. But there was no hot water. Due to the cold weather, before I left I had set the room thermostat to 5C frost protection only, with the boiler activated. Normal...