Air in system

[Micktrickdrink]

Hi can any1 give me sum advice my radiators seem to need bleeding every day as only heating up half way there's plenty air coming out then they heat up properly but never any water comes out,then do it again next day any clues would be very helpful thank

 

[Riley]

Is it an old or new system? It could be badly piped, it could be blocked or partially blocked so the pump is actually pulling air in

 

[Micktrickdrink]

It an old system available actually bled it again 2night and lots of air came out then water,so I tried another 2radiator and nothing came out do I just leave valve open till water comes out

 

[joni os]

As above, blocked cold water feed is usual cause. Less common, air vent on suction side of pump needs closing or pump is circulating in wrong direction. Has anyone worked on the heating recently. Only bleed system with pump off.

 

[Riley]

You are bleeding it correctly what it sounds like is corrosion within the system you really need to get an engineer in to do a full assessment of the system and decide the best course of action to sort the problem

 

[Micktrickdrink]

Downstairs rads seem fine it's the bedroom rads a lot older type rad could it be they need changing how long should I be opening valve to let air out

 

[Riley]

Until water comes out

 

[joni os]

With the cold feed blocked, when you vent downstairs rads you are draining water from upstairs rads. then because of blockage, no water appears at upstairs vents. Sounds like you have confirmed BLOCKED COLD FEED.