We may have found other answers which could help you.
Click here for Year House Fronthow to replace batteries in my Drayton Digistat RF1?
drayton digistatrf1 wireless system?
Drayton Digistat RF2 Wireless system?
how can i fix thermostat?
Drayton sm2 timeswitch?
is it possible to repair a non digital Drayton SM2 timer?