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sorry, just to confirm the stat types are current/faulty = Boss Therm BRT New = Boss Therm BRT MK2

Hi All, I'm wanting to replace my room thermostat which is located in my hall. It is a Boss Therm Mk1. I have a vented combi boiler with a timeclock in my cellar with the time clock set to ON 24/7. I have been using the room stat to basically turn the heating ON/OFF. Lately it hasn't...