one cold rad

[dave maden]

one of my rads is not getting warm top or bottom , system only been in 3_4 years so dont think its sludge , its possibly the furthest from boiler and is downstairs ( boiler is upstairs ) could system need balancing ? i read somewhere that i should shut all other rads and see if it gets warm then . if i try this , do i close both ends of every rad or just the lockshield end or the trv end . if you dont think this is the problem , what else could it be . thanks for any help .

 

[ShaunCorbs]

turn all the other rads off via there trvs and report back (does that rad get warm) leave the cold rads valves open

 

[dave maden]

thanks , should the trv be the inlet on all rads ? thanks

 

[ShaunCorbs]

thanks , should the trv be the inlet on all rads ? thanks

should be (on older systems) but they can on on the return as-long as you have bi direction trvs

 

[thompsonbrown]

thanks , should the trv be the inlet on all rads ? thanks

Possibly. Most trv's are by-directional so it shouldn't matter for what your trying to achieve.

 

[dave maden]

will turn them all off tomorrow and see if the cold one gets hot . if it does what is my next move ? thanks

 

[thompsonbrown]

Unless you have an big air lock, turning other rads off should sort out your problem. If this works then balance your system using the lock-shield valves.

 

[dave maden]

Thanks , i recently had a downstairs radiator re-piped due to some sort of blockage and had to bleed a rad upstairs due to this issue . will see if the cold one needs bleeding first (even though its downstairs ) . would i be able to attempt balancing myself ? is it just a matter of starting nearest the boiler and opening ls valve a quarter of a turn , then each one a little more until you get to the furthest from the boiler of is it more complex than that and would i need a digital temperature meter ? thanks

 

[thompsonbrown]

Start with the rad that gets the hottest first.