hi guys, can anyone assist me, i have just installed a baxi intellistat unit to my baxi 130he combi boiler. It seems to be all working ok, however i think it is showing the "current room temperature " a couple of degrees above what i think the actual is, i.e showing 19degrees Centigrade when a couple of other independent dvices are showing 17degrees centigrade. Is there any way of calibrating the Baxi unit, or is it a fixed non repairable item? Tia. Seane