Boiler not firing – Error symbols on Thermostat – Worcester Greenstar 28CDI Compact
I've installed my Extension Kit and Smart Thermostat following the installation instructions from Tado (it was fairly simple, two wires to the boiler from the extension kit).
All appears to be set up correctly, but the boiler does not turn on when I set the desired temperature higher than the current room temperature. Additionally, the following symbols are shown on the Smart Thermostat.
Any ideas what's wrong?