dmestic hot water near boiling point, howto adjust temperature?
what is wrong with my isar boiler/honeywell thermostat?
where can i buy a new solenoid for my honeywell gas valve?
new programmer fitted?
How can i marry my honeywell CM921 the the BDR91 relay box?
c h boiler heats HW supply only,no central heating?
Ideal W Stelrad Group boiler RS450 1239(3)?
How do I reprogram my ideal bolier rf thermostat receiver?
Hot water but no central heating?
Honeywell ST7100 programmer goes blank when RUN selected?
boiler bangs when zones shut down?
Ideal Classic no heating but have hot water?