Recent content by Serialforeigner

Alright, I'd like to thank everyone for their good advice and helpful comments. The plumber replaced the motorised valve this morning, I replaced the Honeywell thermostat with the Heatlink and everything's working now.

Right, I meant is it likely that the heatlink could have created a condition that led to the motorised valve leaking?

The electrician came out and discovered that the motorised valve is leaking which is causing a short. It was replaced last December when I moved in here because the heating wasn't working and the original one had failed. Is it likely that connecting the Heatlink caused that fault somehow? It...

Ericmark, you are correct. I took the thermostat off, capped all the wires and it still trips. Replaced the old Honeywell and it trips as well. As soon as the boiler circuit is engaged, the RCD pops. The good news is that it's now my landlord's problem. The bad news is that I have no heating...

That's what mine looks like...

This is the Nest Heatlink wiring. Behind that, the blue sleeved wire in the initial image is capped, and the random earth wire is also capped (separately). I have a fusebox which has a main breaker and an RCD, then the usual array of individual breakers for each circuit. I don't understand...

It was 3MB, I've reuploaded a smaller version.

Ok, there was a photo here of the Honeywell wiring. I'm not sure how useful the question is without it. Apparently a moderator removed it, so what do I need to do to replace it? What rule do I need to be aware of in order to include that image?

I installed the Nest Thermostat E, all went well until I turned it on. As soon as the power goes on, it trips the RCD unless the boiler breaker is off. I have an all electric heating setup, the Nest only controls heating, not hot water. The Heatlink replaced a Honeywell 6360 thermostat which...