Is one of my radiators connected wrong??

[arthurbear]

Hi To All

All of my rads have a thermostat knob on them, One upstairs I think has been done the wrong way round...On all but this rad when the central heating is on the pipe going to the rad via the thermo knob is very hot..the other side if luke warm..The one upstairs the pipe going in via thermo knob is luke warm and the other side without is very hot...Does this cause any probs and whats the best way to sort??Thanks

 

[expertgasman]

It doesn't mater as long as the valve is bi-directional. And you would know if it wasn't because of the chatter (noise). So dont worry