Report "Hi I have a Honeywell T6360 room thermostatr trigering a Keston C36 combi boiler. Now suddently the room thermostat is not triggering the boiler at 15 -18C reading as usual it is now triggering the boiler at 30C. Boiler does start working and heating if thermostat is set to 30 although the boiler setting 8 is still 0, Any idea how do I fix the thermostat and what could be faulty?"