Hi,
I'm trying to work out what's going on with my chaff britony combi 80 and any help to understand the problem would be most appreciated.
The pressure gauge shows a reading of 0 - 0.2 bar when cold. But the system still runs OK for CH and DHW. I've topped it up to 1.5 bar when it's cold but when it next starts CH the pressure reading goes up to 3 bar and it vents water from the overflow / pressure relief (metal pipe outside). I've had a look around and I can't see any leaky pipes / rads / valves - there are no damp patches on ceilings under the rads.
I've seen a similar post to this but in that case the system wouldn't come on at all once it reached 0 bar - it was the flexi pipe full of sludge.
Any ideas?
I'm thinking that either
(a) there's a leak I can't find
(b) the pressure gauge is lying / broken
(c) the flexible pipe to expansion vessel is blocked
(c) or it's something else!
I just want to make sure that there's nothing I'm missing and maybe to have a good idea what to ask the plumber if / when they come out.
Cheers
toby
I'm trying to work out what's going on with my chaff britony combi 80 and any help to understand the problem would be most appreciated.
The pressure gauge shows a reading of 0 - 0.2 bar when cold. But the system still runs OK for CH and DHW. I've topped it up to 1.5 bar when it's cold but when it next starts CH the pressure reading goes up to 3 bar and it vents water from the overflow / pressure relief (metal pipe outside). I've had a look around and I can't see any leaky pipes / rads / valves - there are no damp patches on ceilings under the rads.
I've seen a similar post to this but in that case the system wouldn't come on at all once it reached 0 bar - it was the flexi pipe full of sludge.
Any ideas?
I'm thinking that either
(a) there's a leak I can't find
(b) the pressure gauge is lying / broken
(c) the flexible pipe to expansion vessel is blocked
(c) or it's something else!
I just want to make sure that there's nothing I'm missing and maybe to have a good idea what to ask the plumber if / when they come out.
Cheers
toby