Radiator hot in the morning, cold in the evening

[RikkiHolland]

Did you do what I suggested about turning off ALL the other radiators and seeing how hot throughout the day the problem radiator gets? Ensuring the TRV is fully open and the lockshield is open a good amount too?

Not yet, I'll have to do that on the weekend. What am I looking for it to tell me, as the rad has the ability to get hot, just not in the evening?

 

[omega015]

We are looking to see if it stays hot all the time when the room is cold enough to require heat. Then when your satisfied that it constantly heats up as/when it should, turn on another radiator one at a time. Wait a good few hours or even better the next day, ensuring the problem radiator isn't affected before switching on each additional radiator.

Do you have a wireless thermostat btw? If not then the last radiator to turn back on, would be where the thermostat is located. This way there should be a call for heat as that room should be cold enough (assuming the set point is higher than that rooms temp).

 

[RikkiHolland]

We are looking to see if it stays hot all the time when the room is cold enough to require heat. Then when your satisfied that it constantly heats up as/when it should, turn on another radiator one at a time. Wait a good few hours or even better the next day, ensuring the problem radiator isn't affected before switching on each additional radiator.

Do you have a wireless thermostat btw? If not then the last radiator to turn back on, would be where the thermostat is located. This way there should be a call for heat as that room should be cold enough (assuming the set point is higher than that rooms temp).

Thanks - I have a wireless thermostat, which we typically keep in the living room