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