We had a new boiler installed in January 2021 - with nest learning 3. A big mistake! We are on our second thermostat - the first one went into some loop and despite all our efforts wouldn’t reboot. So 3 months in the new one is also constantly flashing red - we have charged it - rebooted it - tried everything on the troubleshooting page. So sick of it - contacting my plumber and asking them to rip the whole thing out and I can get another system. It’s under warranty - not fit for purpose- a refund and a rethink on a different system is my preferred way forward. A totally useless system. Beware Byers get something else.
