my boiler is making a strange sound for the first 10 minutes it goes on. it sounds like a train whistle, i also noticed the pressure has dropped to just above zero. its a baxi system boiler 35/80 ie
Tried topping pressure up to 1bar?? bleed radiators if needed and top bak up to 1 bar.. Should it drop straight away again houstin you have a problem, maybe a leak somewhere..
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