Hi
I have a Baxi Combi 80E and recently the DHW diaphram was leaking through the centre pin, this was causing all kinds of issues like air getting in the system and after running hot water turning the tap off and if turned on again within 15 mins there was no hot water until a load of gurgling had stopped and also pressure would eventually go to nearly zero, so i bought a new one and fitted it. It was quite easy and it seems to be ok now, but im noticing my standing pressure is set to approx 1bar (I know now thats a little too high now and should be 0.5bar) but when running the heating for a while the pressure is creeping up to nearly 3 bar and starting to slightly trickle out of the pressure relief valve. i have disconnected the filling loop and isolated it to eliminate this as a source and it is still happening, now from reading on the internet there are only two other sources for this increase, one being the Expansion vessel diaphram split and water on both sides so nowhere for the pressure to go(just like the old citroen suspension spheres, sorry im a citroen techy) therefore i would need a new one , or a mains leak from the water heat exchanger into the heating side, but would this not increase all the time if this was the case. The boiler is approx 5 years old and im unaware of any servicing being done. Any help would be greatly appreciated
Thanks Chris
I have a Baxi Combi 80E and recently the DHW diaphram was leaking through the centre pin, this was causing all kinds of issues like air getting in the system and after running hot water turning the tap off and if turned on again within 15 mins there was no hot water until a load of gurgling had stopped and also pressure would eventually go to nearly zero, so i bought a new one and fitted it. It was quite easy and it seems to be ok now, but im noticing my standing pressure is set to approx 1bar (I know now thats a little too high now and should be 0.5bar) but when running the heating for a while the pressure is creeping up to nearly 3 bar and starting to slightly trickle out of the pressure relief valve. i have disconnected the filling loop and isolated it to eliminate this as a source and it is still happening, now from reading on the internet there are only two other sources for this increase, one being the Expansion vessel diaphram split and water on both sides so nowhere for the pressure to go(just like the old citroen suspension spheres, sorry im a citroen techy) therefore i would need a new one , or a mains leak from the water heat exchanger into the heating side, but would this not increase all the time if this was the case. The boiler is approx 5 years old and im unaware of any servicing being done. Any help would be greatly appreciated
Thanks Chris
