Cold Radiator and pipes to radiator

[taffylassie]

Hi Guys
I have a cold radiator downstairs. All other radiators up and downstairs heat and pipes to the radiators are hot. The pipes to the cold radiator are also cold. All the radiators have been bled, this did not help. Turned all rads onto to max, this did not help. Turned all off except the cold radiator, this did not help either.
What can I do?
thanks in advance for any advice.

 

[spacethegas]

perhaps the thermostatic valve is stuck off.

remove the head & check the pin will move up & down.
don't pull it up, just depress it.

 

[taffylassie]

Sorry being a typical useful female now ...but trying to be independant...How do I get the head of the the valve, can't seem to see how to do that, it is a Honeywell TRV

 

[spacethegas]

they generally unscrew. anticlockwise.

 

[poolebybirth]

yep could be a faulty TRV sensor head or as mentioned above the pressure pin could be stuck.

Sometimes you can unscrew the heads off TRVs or sometimes there may be a small screw that needs to be undone first.

 

[taffylassie]

Not that I know much about this stuff, but wouldn't the pipes to the radiator be hot if it was a TRV problem. I am assuming that these valves just stop the hot water going into the radiator itself. Or is that too simplistic a view

 

[spacethegas]

if no hot water can enter the rad then no water can travel down the pipe to the rad.

 

[taffylassie]

Have just checked the TRV valve and this all looks okay. Pin moves up and down.

 

[poolebybirth]

Ok try the heating on now and see if it works with the sensor head off? ..

 

[taffylassie]

nope, still no heat to radiator or pipe

 

[buck51]

Hi there, cant believe that no body said this sooner. Take the cap off the valve at the other end of the radiator and check it is open by turning it anticlockwise

 

[Goldspoon]

Can't wait to see if that works...

 

[taffylassie]

Hmmm. Have tried the valve at the other end, but it will not turn either anti clockwise or clockwise.

 

[buck51]

Hi again what have you used to try to turn it

 

[taffylassie]

Tried to turn it using a wrench