While you wait for answers, we may have found some information which could help you.
Success
Message
Hot water but no central heating?
How do I reprogram my ideal bolier rf thermostat receiver?
Replacing LP112 Programmer?
can i fix it honeywell st1000 ?
Mid position valve?
Honeywell ST7100 programmer goes blank when RUN selected?
isar he30?
why has my wireless time clock stopped responding?
heating, Oil boiler not running?
Ideal Classic no heating but have hot water?
dmestic hot water near boiling point, howto adjust temperature?
Converting to Y Plan system?