We had a problem yesterday where we had no heating or hot water, although we had around 153m2 of gas on the meter. When I checked the boiler, a 2 and a half year old Vaillant ecotec pro 28, the red light was on and the pressure gauge was right at the bottom. So I connected the priming hose and turned on both valves and nothing happned, the needle was just stuck at the bottom. But then when I tried the heating again, it came on and both it and the hot water worked fine. Then this morning we had no heat or hot water again and I had to go through the same routine again. When I try priming the system, the needle doesn't even flicker.
I haven't got the manual. Can anyone point me in the right direction of what I should be looking at to fix this?
I haven't got the manual. Can anyone point me in the right direction of what I should be looking at to fix this?