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it's hard to take an actual picture (dark and cramped) but here's a diagram. I can try an actual picture if that would help...

thanks for your help both of you! sounds like it's probably not something i should be doing myself (particularly at this time of year - i don't think i'd every be forgiven if i killed the boiler!) i'll get someone qualified to check out the reset switch sometime soon! thanks again

this is probably a stupid question, but what do you mean by pump overrun? the pump does carry on for around 3 minutes (i can hear it) after the clock has switched to off - is this overrun? and what does the reset switch do? (another stupid question?) thanks again. i'd been puzzling...

thanks for that. I'm pretty sure it's not 1, as i tried a new stat, and it's not 2 as there is no wire present linking 1 to 2. so i guess it must be 3. do you know why it would have been set up that way so that the clock overrides the stat? (i only moved here 6 months ago, so i have no...

The room stat runs to the boiler (terminals 1 and 2). There is one cable running from the clock to the boiler, which has red (wired to live in the boiler), black (wired to neutral) and green/yellow (wired to earth).

That was my first thought - to connect them in series. But to do that meant removing the link from 1 to L and then the boiler had no power. If it helps at all, the mains isolation switch for the boiler is directly above the wall-mounted clock...

Hi, I've got a Potterton Performa 28 with an external clock (on a wall in the kitchen), the make is Lifestyle ACL LS111. I've also got a Honeywell T6360 room thermostat. It's a small problem, but annoying, and no doubt bad for my gas bill! My problem is that the room thermostat doesn't...