Central Heating (radiators unevenly hot) (Ed.)

[Aob]

Hello
I have oil central heating in my house approx ten radiators, my oil was quite low so got a fill since I got the fill some of my rads are not heating up just the pipe at the bottom and the other rads that are heating up are good and hot , we have tried bleeding the rads but only one water coming out
Any suggestions or is time for a plumber
Thanks

 

[Rodders53]

As with all CH systems coming back into use after the mild autumn -- the most likely culprit is a stuck in thermostatic radiator valve.

Remove head and see of the pin is free to move. If not try to free it up and see if hot water flows into the radiator then.

 

[Aob]

The pins seem fairly stuck , they would have been working prior to the refill woukd this make a difference in your opinion

 

[Rodders53]

Picture or make/model of TRV... My Boss/Pegler Terrier valve pins hardly move at all but I can feel them do so when operating with a large adjustable pressing down.

Sat idle the valve pins stick often enough.

The kerosene oil fill was a coincidence. Oil has no connection to the CH circulating water. (Oil gets burnt to heat a water-filled jacket in the boiler that is then pumped to the radiators and back in a loop.)

 

[Aob]

That is the valve same all all rads

 

[Rodders53]

and the valve' thermostatic head or wheel head or cover ?

What does the valve at the other end of the radiator look like?

I don't think that valve is a TRV one - but then nor is the spindle a typical manual valve shape.