Please help, radiators not working correctly.

[Frab]

I have just moved into a house with a five year old boiler. I have found that there are two radiators which are getting heat going into them from the pipe, but it is not circulating to the radiator atall. One radiator is downstairs and the other is upstairs. They are the only two radiators without a temp regualtor on them. I have bled all radiators in the house and tried the hitting the pipes hard method but to no prevail...! Any help would be greatly appreciated. Thanks

 

[Thoggy]

It needs balancing i would get a plumber in its not an easy job sometimes.

 

[Frab]

ah thank you. is it worth having a go myself?

 

[Thoggy]

Turn all radiators of except the 2 that don't get hot and see if they get hot.

 

[Frab]

Ah I did try that and it got no where. Thank

 

[JCplumb]

and tried the hitting the pipes hard method but to no prevail...!

I wouldn't do that 'method' if I were you...

 

[Frab]

thanks JC Plumb, it was done due to someones advise, have you any other ideas?

 

[JCplumb]

You have a circulation problem, possibly air lock, possibly sludge, possibly pump, possibly zone valve

 

[Thoggy]

Best advice is get a plumber in, post on the looking for plumber section on here so you get someone who knows how to sort it and not a cowboy, or ask a family member if they recommend someone. It will be worth it trust me especially with it dropping below zero the coming days.

 

[JCplumb]

Are there drain off cocks on any of the cold radiators?

 

[Frab]

Thank you Thoggy

 

[Frab]

JC Plumb- how would i know the difference please?

 

[JCplumb]

Impossible to say on a forum without knowing all the facts.
Are you sure your lockshield valves are open on the cold rads? And the TRV's are open too?

 

[Frab]

I will have a look, thanks for your help. Would these be normal spanner type bolts?

 

[JCplumb]

I'd go with Thoggys suggestion above and get someone in, please don't use spanners on anything in the meantime 😉
I'm guessing this is something a plumber could sort out in no time and wouldn't be costly.

 

[leaky]

if one pipe to the rad is getting hot and the pipe the other side is cold you have no flow so open with the head or if stiff take the plastic cap off and open the valve with a pair of grips or a ajustable should do the trick