We've had the boiler serviced, clean bill of health. Then had a leak from the water cylinder, so that system replaced. Engineer re-pressurised the boiler, and the central heating worked. Within a day the pressure had dropped again. It comes on for about half an hour now, then cuts out again.

Who do I call to fix it - ie, what do I tell them thats wrong. Is it a leak somewhere?

Lisa, October 2007

sorry the water is leaking in to air side which in turn is a drop in pressure . check your outside behind the boiler there will be a copper pipe on the out side of your house if that is leaking water or there is stains of water .that is the problem

BQ, December 2010

the boilers diafram is more than leaking air in to the water system

bq, December 2010