H9 and L9 errors?
Replace a wireless termostat with a hard wired one?
How do I reprogram my ideal bolier rf thermostat receiver?
Mid position valve?
channel plus xl model h37 timer showing 14.76 and none of the buttons are w?
digistat not working properly?
The light on the heating is fading in and out on my lp112 control panel?
Hot water but no central heating?
Honeywell ST7100 programmer goes blank when RUN selected?
dmestic hot water near boiling point, howto adjust temperature?
why has my wireless time clock stopped responding?
24i fan keeps stopping poss bearing ?