Heating not working
I have an installation that has been working for 3 years now. However, I've just started up the heating for the winter and the boiler isn't firing. With the extension kit disconnected, the heating works just fine with the boiler's standard controls. I've had an engineer out today who confirmed that the boiler is ok and the extension kit is wired correctly, but isn't sending the signal to the boiler to start up. The smart thermostat is set to 25 degrees and is calling for heating, both my radiator thermostats are calling for heating too - so there's plenty of signals for heat from the devices.
I've removed all devices from my apple home so they're only active in the tado app. I've tried doing a reset of the bridge (HomeKit enabled one) and reconnecting the extension kit. Everything looks good in the app - all showing connected. The bridge lights are all on. The extension kit light is solid on (doesn't seem to be pulsing like the website says it should). The only thing that looks a little off is the smart thermostat shows arrows in a circle for a second or two before reporting the temperature - I haven't seen that before.
Any ideas? I've reached out to Tado, but so far haven't gotten a response.