one of room heatings doesn't have heat

[kaijun]

In one of my rooms, heating doesn't work this year. There is no heat. I have unscrewed TRV and checked the pin. I can push down the pin and it springs back. I have no idea what is wrong. Any idea? Thanks

 

[kevplumb]

system is

 

[kaijun]

system is

This is a new house. I moved in two years ago. the boiler is Ideal ICOS.

 

[MANDATE]

="kaijun";p="1402962"]In one of my rooms, heating doesn't work this year.

Has it ever worked? Sounds as though the system has never been balanced. Maybe you have a by-pass valve that is open too much, this would allow water to return to boiler instead of going through your problem radiator, especially if the radiator is furthest from boiler.
What about the lockshield valve on the other end of radiator, if thats closed, then it wont heat up.
Have you tried closing the other radiators so all flow is to the problem radiator.

 

[kaijun]

="kaijun";p="1402962"]In one of my rooms, heating doesn't work this year.

Has it ever worked? Sounds as though the system has never been balanced. Maybe you have a by-pass valve that is open too much, this would allow water to return to boiler instead of going through your problem radiator, especially if the radiator is furthest from boiler.
What about the lockshield valve on the other end of radiator, if thats closed, then it wont heat up.
Have you tried closing the other radiators so all flow is to the problem radiator.

It worked last year. I have adjusted lockshield valve, it doesn't help

 

[MANDATE]

Try bleeding the radiator with one valve shut then reverse the situation.
Water should come out in both cases, that is after any air has come out.

 

[kaijun]

Try bleeding the radiator with one valve shut then reverse the situation.
Water should come out in both cases, that is after any air has come out.

My heatings don't have bleeding valve

 

[MANDATE]

They Don't! So how do you bleed air from radiator with no bleed valve?

 

[kevplumb]

feel along the back top of the rad