I've changed the batteries in the thermostat and the radiators have all gone off! Hot water still working.
Have looked on forum and Siemens instructions but don't understand any answers I've found!
Need idiot's guide please- am desperate, have baby and small child in bed and it's freezing!! thanks. x

Helen., March 2016

It may have lost it's pairing with the base unit (receiver ) if you cant get it to work I'm sure you can override the stat by pressing the 2 buttons on the receiver to get you going until you sort it out

toptrish, March 2016