Replacing LP112 Programmer?
Ideal Classic no heating but have hot water?
How do I reprogram my ideal bolier rf thermostat receiver?
No heating and no hot water?
dmestic hot water near boiling point, howto adjust temperature?
Ideal W Stelrad Group boiler RS450 1239(3)?
Do I have a gas valve leak?
c h boiler heats HW supply only,no central heating?
VCW GB 242 EH Valliant Boiler?
Mid position valve?
No heating,but have hot water?
what is wrong with my isar boiler/honeywell thermostat?
where can i buy a new solenoid for my honeywell gas valve?
Converting to Y Plan system?
Honeywell ST7100 programmer goes blank when RUN selected?
How can i marry my honeywell CM921 the the BDR91 relay box?
boiler bangs when zones shut down?
why has my wireless time clock stopped responding?