My old (maybe 25 years) Ideal Classic sealed system gas boiler has become quite noisy. I think it's the water pump trying too hard. Adjusted this through its 3 settings. I notice the water pressure is near, if not, 0. The boiler fires up, the pump kick in, it is heating rads (somewhat) upstairs and down. No air in rads. After maybe 20 mins it gets noisy (or vibrates perhaps) and the analogue pressure gauge might get to 0.3 or 0.5 Bar (so I guess that's working). I switch it off and it goes back to 0. There seems to be air in the the expansion vessel and no sign of leaks generally or water from the external relief pipe.
Anyway I reckon that if I can repressurise the boiler to 1.5 BAR it might start behaving. However, I cannot find a filling loop anywhere. I've found what I reckon is a the heating system's gravity fed water pipe in the hot-press but opening the valve on this does not increase the water pressure on the boiler (is it possible this is air locked or blocked?).
Bit of a Scooby-Doo mystery. Any suggestions before I call a plumber?
Anyway I reckon that if I can repressurise the boiler to 1.5 BAR it might start behaving. However, I cannot find a filling loop anywhere. I've found what I reckon is a the heating system's gravity fed water pipe in the hot-press but opening the valve on this does not increase the water pressure on the boiler (is it possible this is air locked or blocked?).
Bit of a Scooby-Doo mystery. Any suggestions before I call a plumber?
Last edited: