Thanks for your answer - I will do as you suggest. I thought it might be a balancing issue but I believed, maybe incorrectly, that the affected radiators would take ages to heat up if that was the case.
Many thanks
Hi all - newbie to the forum
Last year we had new radiators throughout the house. We also had a new boiler.
This year I have noticed that 2 of the radiators upstairs go cold - but only after the heating has been on for about 2 hours. Before this time they belt out heat. The temperature...