Help! Air Lock???

[RopleyChris]

Hi,Yesterday I had a new hot water cylinder replaced by a plumbing friend.He drained the system etc etc, all is fine apart from when we switched back on,all the radiators worked, apart from 1 downstairs and two upstairs.When I tried to bleed these,only cold water is coming out and no air.Am I being a tube and it is something simple(I hope so)We are on a Oil fired system, Hot water is fine,Tank is fine,Ballcock is not stuck.Can hear lots of rattling in pipes so hope it is a simple Air Lock.Your comments would be much appreciated

 

[TicklyT]

Try turning off the working rads and running the system for a while. That may help shift any airlocks.

 

[xr4x4]

did he move any of the locksheilds on the rads?

if he has, he may of 'unbalanced' the system

 

[RopleyChris]

Thanks Tricky T Trying that now as I type.

xr4x4 As to the locksheilds I may have adjusted some as we have a couple of Rads that have no plastic covers on them and I am sure that these have been adjusted in the past.If so is there anything I can do or is it a case of getting a Pro out

 

[xr4x4]

basically its a matter of reducing the flow to the rads ethier smallest/hottest/nearest the boiler, using the locksheilds.

this allows the hot water to be pumped to the furthest colder rads.

 

[RopleyChris]

Thanks Guys,now ALL the radiators are Hot.Also Hot water is too hot so have had to turn down the temperature,I suppose that shows how inefficient the old one was.Thanks Again