Boiler stopped working Tuesday (after the v cold night). Boiler located on outside wall in unheated utility room which is effectively at the rear of the attaached garage.
Flow and return pass above the ceiling so can't tell if they are lagged or not but presume so.
Boiler serviced by Gas Board beginning of Dec (first time for years) and given complete bill of health.
All components appear to be working ok (room stat, cyl stat, 3 way and programmer) but boiler does not fire up.
Question: would frozen pipes close tyo the boiler stop it firing i.e no water flow thru the heat exchanger?
Hi I am having same problem with mine,just posted on the site for help. However, I think I have short listed down to two things AIR PRESSURE SWITCH OR CIRCUIT BOARD. Probably either will be expensive no doubt.
I take it your pilot light works? If not it could just be your flame sensor (thermo-coupling)
Yes frozen pipes will stop system from working full stop.
By the way your boiler service with Gas Board should be guaranteed by them for 12 months so give them a call. Dont freeze.
thanks for your response - bit more constructive than our simon@hwch!
replaced the control unit and all fired up ok. Left system running on continuous and went to bed. Something (maybe house getting colder again) made me get up and check at 4.00 am. Boiler not lit but fan going.
Turned the boiler stat off then on and all fired up again. But it stopped later in the day.
Now don't know whether the original control unit was iffy or not. And if it is the pressure switch - then has this taken the new control box down as well???
Will talk to potterton 2 moro.
Hope its not the gas valve - no longer available as a spare.