Nest thermostat heatlink has died a second time. both seemed to last around 8 months. Google service isn't great either, seems like no trust that it's a fault. they demand you pay 40 quid or so until the broken heatlink back. right now I've got no heating, awaiting senior engineer to get in touch. even though I've sent them pics of the broken heatlink, even with multi meter readings showing voltage reaching device but it not lighting up. another week with no heat due to the rubbish device. I'd been with Netatmo before without any issue, but with the new boiler the nest came with it - wish I'd just thrown it in the bin.