I hope someone here will be kind enough to help me. I have for the past few days been having the central heating come ON, on its own despite the Room thermostatic control downstairs and the central heating timer control attached to the Boilermate 2000 button being in the OFF/0 position. I have turned off the valve controls to all the radiators in all the rooms bar the one in the hallway that does not have radiator valve control,yet the central heating comes on blazing hot on its own and then turns itself off without it being switched on by anyone, and not time-controlled. This is driving me crazy and hope that someone here will be able to help, more so now that summer is here. I have the following for hot water and central heating: Boilermate 2000, Gloworm Micron boiler and Siemens RAA02.1N Landis & Staefa room thermostat control. What could be wrong? I have just ordered a replacement Siemens RAA02.1N Landis & Staefa Room Thermostat control in the hope that this will fix the problem. Any advice/solution will be most welcome and appreciated. Lavenderman.