Hot Water Pressure from Combi very very low

aim001 · Mar 30, 2009

Hi All, Can someone please give me some advice. I have a Worcester combi boiler ( oil fired). My hot water pressure has slowly got very bad, to a dribble. Th epressure gauge is normally around 1 bar. I picked up the expansion vessel and discovered it is full of water....is this normal or is this the problem.

many thanks...Aim001

Mike Jackson · Mar 30, 2009

The expansion vessel is on the heating circuit not the hot water so has no relevance to this problem.

You're looking at a blockage, possibly scaling of the heat exchanger.

Mike

migoplumber · Mar 30, 2009

need your boiler make to give further advice.

shaun

stevetheplumber · Apr 1, 2009

almost certain to be a scaled up domestic heat exchangerreal bithch to change on some older worcesters
exspansion vessel not relevant to this problem but yes it will contain water while the system is preasurised

Pataing · Apr 3, 2009

Just sorted a similar problem, removed ball valve from hot water pipe to kitchen sink and was rammed with scale. Likewise valves to other appliances. Worth a check at least.