Sorry if this is long winded. I have other posts about a problem with my britony combi 80 and since I'm Still waiting for my heating engineer to turn return I though I'd fault find.
I won't replace any parts myself but if I can tell him what to look at it might give him a kick up the butt.
After a pressure issue (stable at 1 bar until burner and pump running) and gargling noise coming from the expansion vessel he fitted an external expansion vessel and pump. Still no further forward though.
The problem has been intermittent so I thought about moving parts and the only one i could think of is the diverter. I turned the hot tap on, the fan, pump and burner kicks in and the pipe coming from the chamber gets hot. The pressure then bounces all over and the boiler cuts out and the expansion vessel gargles. As the boiler cuts out the tap water goes warm and then cold again. It's a similar story with the heating.
Could the valve be stuck in a neutral position causing pressure to build, force water into the original expansion vessel and then cause the gargling noise as the pressure drops and water then escapes the vessel?
I won't replace any parts myself but if I can tell him what to look at it might give him a kick up the butt.
After a pressure issue (stable at 1 bar until burner and pump running) and gargling noise coming from the expansion vessel he fitted an external expansion vessel and pump. Still no further forward though.
The problem has been intermittent so I thought about moving parts and the only one i could think of is the diverter. I turned the hot tap on, the fan, pump and burner kicks in and the pipe coming from the chamber gets hot. The pressure then bounces all over and the boiler cuts out and the expansion vessel gargles. As the boiler cuts out the tap water goes warm and then cold again. It's a similar story with the heating.
Could the valve be stuck in a neutral position causing pressure to build, force water into the original expansion vessel and then cause the gargling noise as the pressure drops and water then escapes the vessel?