dmestic hot water near boiling point, howto adjust temperature?
what is wrong with my isar boiler/honeywell thermostat?
Radiators not all working all the time???
Ideal W Stelrad Group boiler RS450 1239(3)?
No heating,but have hot water?
c h boiler heats HW supply only,no central heating?
Do I have a gas valve leak?
how can i check my honeywell v4073a 3-way diverter valve?
Honeywell ST7100 programmer goes blank when RUN selected?
new programmer fitted?
No heating and no hot water?
where can i buy a new solenoid for my honeywell gas valve?