Hi all, I have an Electromax boiler (Heatrae Sadia), and I'm having a pressure issue. The pressure is near to 0.5, I know that it should be about 1.5. The filling loop was already connected, so my understanding is that opening both the valves of the filling loop the pressure should start going up. But when I open the valves nothing change (no noise of water or anything). Photo: https://drive.google.com/file/d/1uGz_Oo8STlh0aWiBw3Jrtl8a28PVlT5P/view?usp=drivesdk How can I bring back the pressure to 1.5?