c h boiler heats HW supply only,no central heating?
Ideal Classic no heating but have hot water?
how can i check my honeywell v4073a 3-way diverter valve?
C H Boiler heats D W only ie no C.H?
Radiators not all working all the time???
How do I reprogram my ideal bolier rf thermostat receiver?
Converting to Y Plan system?
what is wrong with my isar boiler/honeywell thermostat?
Replacing LP112 Programmer?
Do I have a gas valve leak?
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?
ideal icos he15 no display?
why has my wireless time clock stopped responding?