The pressure in the boiler is usually at 1.2 bar, but every couple of weeks I see the pressure slowly decrease to about 0.8 bar.By the morning the pressure has dropped to 0 and of course the heating will not come on. When I re-prime the system the pressure gauge rapidly goes up to 1.0 bar and then slwly increases to my shut off point of 1.2 bar.
Has anyone got any suggestion as to the cause of the rapid drop on the pressure gauge and why the rapid increase back up to 1.0 bar?.
Has anyone got any suggestion as to the cause of the rapid drop on the pressure gauge and why the rapid increase back up to 1.0 bar?.