Nest just replaced our heat link, and it's now showing a flashing blue light. The thermostat shows that the heat link is connected, but turning up the thermostat will not activate the boiler. I've reset the thermostat, the deleted and reinstalled the Nest app (as suggested in another post), but to no avail. Manually activating the boiler by pressing the button on the heat link works and the heat comes on, but the thermostat seems unable to activate the boiler.
