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@D_Hailsham: "Gone lazy" is what seems to happen to all roomstats eventually, in my experience. I mean the gap between switching on and off gets wider. Having set a stat you shouldn't have to touch it again - but after a like a year you start finding the home has gone chilly so you have to up...

Thank you so much Mr Hailsham. That's what I needed, Clarity. The fitted stat which has "gone lazy" is a Drayton RTS1. I suspect the original might have been an RTS4 (which looks identical I believe) because the boiler is a combi (Glow-worm Ultracom 18sxi). I've now determined 2 things...

OK sure, the colours ought to mean:- Brown: Live Dark Grey sleeved Dark Brown: Switched Live Light Grey sleeved Blue: Neutral But what I was hoping was that you'd all say "That's what you'd expect to find in a modern house, it's standard to first-fix a cable with Brown, Light...

We've moved to a house which was only built a couple of years ago. The room thermostat got "lazy", so I've been trying to replace it. But I can't suss out the wiring at the stat. It's no good looking at the boiler-end because all wires seem to go through a 12-terminal wiring center in the...

Thank you kindly electronicsuk, fig 3.19 on p23 seems to cover my case. Of course no figure that I've seen includes a 16-terminal wiring centre, but I should be able to map across to my sketch diagram of the connections I could follow, and hopefully it will all fall into place. Thanks again...

Hi flameport. In your flame, you seem to have missed the point that there IS no wiring diagram, which is why I'm asking DaveyOz about software. dw32

Hi, I tried to post thank-you's to 3 guys who responded to: "Heating problem in modern: boiler runs then instantly stops" but for some strange reason it seemed to goto some other thread or something, which I can't find now. Could you please move it to Heating problem in modern: boiler runs...

Thanks matt1e, Taylortwocities and ban-all-sheds. I'm heating the water using the immersion at present. I guess I'll have to try switching it off for a while then verifying that NOT DHW is voltage-free. I'm not sure about posting in a plumbing forum. It's an electrical rather than...

First, apologies: I'm cross-posting. I read your rule, but I'd posted this in DIY-forum.net hoping to reach Dave Osborne (or DaveyOz), but maybe he's away. So I'm cross posting here. PLEASE don't be too unkind. Hi, I'm having a problem with a CH system in a newish house (~2 years old)...