We may have found other answers which could help you.
Click here for Cold Radiators Heat
Honeywell921?
can i fix it honeywell st1000 ?
How to remove the front cover of my Digistat 2RF receiver?
how often do we change the3032 battery in a digistat +2rf?
Fan running continuously?
How do I reprogram my ideal bolier rf thermostat receiver?