Hot water but no central heating?
Honeywell ST7100 programmer goes blank when RUN selected?
Y Plan - Mid Position Valve 'fault'?
dmestic hot water near boiling point, howto adjust temperature?
The light on the heating is fading in and out on my lp112 control panel?
Fan running continuously?
how can i check my honeywell v4073a 3-way diverter valve?
24i fan keeps stopping poss bearing ?
Remote timer bps242rf how does it work ??? ?
boss therm not working ?
H9 and L9 errors?
channel plus xl model h37 timer showing 14.76 and none of the buttons are w?
Mid position valve?
why has my wireless time clock stopped responding?
Can you get just a new RDJ10RF thermostat or does it have to be the set?