new programmer fitted?
why has my wireless time clock stopped responding?
Hot water but no central heating?
How can i marry my honeywell CM921 the the BDR91 relay box?
Ideal Classic no heating but have hot water?
VCW GB 242 EH Valliant Boiler?
dmestic hot water near boiling point, howto adjust temperature?
boiler bangs when zones shut down?
How do I reprogram my ideal bolier rf thermostat receiver?
Honeywell ST7100 programmer goes blank when RUN selected?
c h boiler heats HW supply only,no central heating?
Radiators not all working all the time???
what is wrong with my isar boiler/honeywell thermostat?
Programming Honeywell CM921?
HOW DO I SET IT?