Keep getting air in radiator after system drain

Charlie24

Last week I had a plumber round to replace a leaking TRV on the radiator in my bedroom, which involved him draining this radiator and also one of the downstairs radiators. The TRV is now fine but since then I have been having issues with air in another upstairs radiator (on the landing). I have needed to bleed this radiator almost every day as it has a cool spot at the top, although it is still getting very hot towards the bottom. I know this radiator is prone to getting air in it as it is the highest one in the system, and I'm guessing that the plumber introduced a lot of air during the drainage, but I'm concerned that I've been having to bleed the radiator so frequently. Will the air eventually work its way out of the system over the next few days?

Thanks in advance for any suggestions!

Alfrescodave

You can get self bleeding radiator valves which would remove the need for you to do it regularly - but I haven't any experience in using them . Others might wish to comment.

But if this problem continues then you might need to investigate further

Jonesya

I shouldn't worry, with the system now refilled and under some pressure no more air will get in, but if it's a sealed system you want to keep an eye on the pressure if you're bleeding air out.

SandraX

Ours does the same thing. We had brand new CH system a few years ago as the house had wram air heating. Recently our thermo vlave on a rad started leaking we had it repalced like you, and now there are noises and air and filled up system several times. It's a sealed unit we were told, don't understand. Hubby beld the system having read advice from plumbers starting from furthest rad first and adjusted the lockshield valves I think they are called but no air but little ticking noises and stem 3/4 yrs old

MR_M_P

Air obviously rises, just keep bleeding until it's all gone
As said keep an eye on the pressure, normally 2 taps if you have to add some water

thegasmon

it will be fine, once you have removed the air. all systems have a radiator or two which get some air trapped even sealed systems.

Whitterbod

also has the heating pump speed been altered to a faster speed as this can suck in air try going from 3
to 2, also check the water level in the top up tank in the loft