Can anyone tell me what the cause of the following is please.
Pressure drops to Zero. No heating or hot water
Re pressurise to 1.5 bar.
Heating and water ok.
Pressure goes up to 2.5 - 3 bar.
Water overflows from outside overflow pipe.
Turn off C/H pressure drops to zero after a while as the boiler cools down.
Is it likely to be the expansion vessel?
Pressure drops to Zero. No heating or hot water
Re pressurise to 1.5 bar.
Heating and water ok.
Pressure goes up to 2.5 - 3 bar.
Water overflows from outside overflow pipe.
Turn off C/H pressure drops to zero after a while as the boiler cools down.
Is it likely to be the expansion vessel?