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Ha what meters are you using that flashes green :-) , no the meter shows that power is attempted to be passed from pin 1 to pin 3 on the boiler via the relay in the heat link but then returns to 0. This continues as the lights flash on the heatlink and you can hear the relay clicking over inside...

I did put a meter across it last night, the meter demonstrated the same as the lights on the heatlink.

No problem, happy to take your advice. I can simply set the boiler status to be on all the time and utilise the nest once I get it working.

I thought as much......spent an hour looking at it and scratching my head last night!

Hi Stem, thanks for the prompt response. The boiler timer will still be utilised but using the nest as the thermostat when active. Yes I have removed the original loop that was installed between 1 and 3 on the boiler. The heatlink has a separate independent L and N feed run through a fused...

Hi All, I have recently purchased a Nest to install alongside my combi boiler. My boiler currently does not have a thermostat, it has a timer / controller on the boiler that I use to turn on / off the CH. The thermostat connections on the boiler are 'volt free' and currently there is simply a...