changing heating programmer?
Location of pilot light Thorn Housewarmer Super back boiler?
thorn gas valve purchase?
Clunking noise when my boiler starts?
what boiler would i replace my thorn 44/54 with?
thorn apollo boiler no gas coming through ?
unable to light pilot on thorn m44/54b boiler?
thermocouple?
We have a Thorn M gas boilder which is years old. Would it be safe to inst?