Search results

Thank you for your adices, I checked the voltage between N and G and is 0.5 v and between boiler case and N is the same, 0.5 v, is this the problem? And about the pump proving switch , it does not have something like that. About the test program, I do not know what is that, could be...

Hello everyone and thank you in advance for your advices! I have in my house an old vaillant boiler which was instaled from the previous owner . The gas boiler is a Vaillant VCW 195/3-C-HL. The boiler works pretty good but the only issue is that after the heating cycle, when the room...