While you wait for answers, we may have found some information which could help you.
Click here for Central Heating Gas Valve Replacement
Fan running continuously?
how often do we change the3032 battery in a digistat +2rf?
can i fix it honeywell st1000 ?
Honeywell921?
is there a way to just simply turn the temperature up?
How to remove the front cover of my Digistat 2RF receiver?