My boiler works perfectly on the hot water circuit. As soon as the heating is switched on, the pressure builds, until it blows water out the pressure relief valve, then obviously the pressure is too low for it to start again in the morning.
Ive had new pressure relief valves and the filling loop is brand new and fine.
Anyone got any ideas what could be wrong?
Ive had new pressure relief valves and the filling loop is brand new and fine.
Anyone got any ideas what could be wrong?
