Replacing LP112 Programmer?
heating, Oil boiler not running?
Radiators not all working all the time???
Ideal Classic no heating but have hot water?
Converting to Y Plan system?
C H Boiler heats D W only ie no C.H?
Programming Honeywell CM921?
dmestic hot water near boiling point, howto adjust temperature?
How can i marry my honeywell CM921 the the BDR91 relay box?
VCW GB 242 EH Valliant Boiler?
why has my wireless time clock stopped responding?
c h boiler heats HW supply only,no central heating?
what is wrong with my isar boiler/honeywell thermostat?
Hot water but no central heating?
can i fix it honeywell st1000 ?