i have this valliant boiler and its started to make a quiet loud noise every time i turn a hot water tap on. it sound like an elephant trumpeting or even a aeoroplane going into a dive bomb (yeah i know it sounds made but its the best way i can discribe sound) it does not make any noise if i turn on heating.
anyone have any ideas what it could be and what needs changing.
thanks in advance
anyone have any ideas what it could be and what needs changing.
thanks in advance