We have a system/conventional boiler (Viessmann Vitedens 100W) with a feeder tank in the loft.
A leaking radiator valve upstairs was changed, which involved draining quite a bit of water from the system. After fitting the valve, the engineer refilled the system and mentioned we may need to bleed any radiators.
Since then we have had a constant loud running water sound in the airing cupboard when the heating/DHW is on. There are no leaks anywhere, the sound is inside the pipes. I have bled the radiators and there is no air coming out of them, though one downstairs radiator remains cold, which combined with the running water sound suggests there may be air stuck in the system?
Reading on here and elsewhere, I have also tried letting air out of the valve above the DHW tank in the airing cupboard, though just water came out. There is still plenty of water in the feeder tank in the loft. Is there anywhere else to bleed air from?
Do you have further ideas how else to get air out of the system please, to get the final radiator working and stop this incessant running water sound?
Thank you
A leaking radiator valve upstairs was changed, which involved draining quite a bit of water from the system. After fitting the valve, the engineer refilled the system and mentioned we may need to bleed any radiators.
Since then we have had a constant loud running water sound in the airing cupboard when the heating/DHW is on. There are no leaks anywhere, the sound is inside the pipes. I have bled the radiators and there is no air coming out of them, though one downstairs radiator remains cold, which combined with the running water sound suggests there may be air stuck in the system?
Reading on here and elsewhere, I have also tried letting air out of the valve above the DHW tank in the airing cupboard, though just water came out. There is still plenty of water in the feeder tank in the loft. Is there anywhere else to bleed air from?
Do you have further ideas how else to get air out of the system please, to get the final radiator working and stop this incessant running water sound?
Thank you