Hi, can anyone help with ideas please? Even though all the other radiators can be really hot, the large radiator in the living room gets tepid at best, even with the TRV (I think it's called) set on maximum. It used to work OK. My hubby thinks the TRV is working OK as the pin isn't stuck. The first thing he did was to bleed the radiator, but no air came out. The pipe to the radiator gets hot and the very first bit of the radiator. My hubby took the radiator off the wall and flushed it through but he said it was clean anyway and that didn't make any difference. We're wondering if changing the radiator for a new one would solve the problem. Could anyone advise please?