I took the danfoss trv head off and made sure that the pin was free. I've drained the radiator and refilled it and bled all the air out but the radiator (and return pipe) stay stone cold. What can I try next?

Esther, March 2009

have you tried putting your winkie on it?

the winkie man, November 2009

Some time the heads on the TRV is broken and doesn't move ehrn you change the setting it is on. Try replacing the head, otherwise the radiations will need to be re balanced. Switch off all the other radiators and leave the one that is cold on. If it heats open all the other radiators one at a time a quater turn. If the radiator starts cooling down shut the valve of that radiator slightly and continue with the radiator where you left

Simon, March 2009