HR92 not operating valve

[fysmd]

Hi all, I have a room with two rads, each with an HR92 on them, has been working fine but recently I notice one of them is not operating the valve.
Even when the room has demand (confirmed on the controller and by valve position at 100 on the other HR92), this one does not operate and reports a valve position of zero

It is communicating with the controller (It displays the setpoint correctly) and after resetting it I hear the valve motor move but only briefly.

Valve locking switch is locked but I dont know how to confirm this is recognised by the unit itself?

Any clues gratefully received..

[Karl4745]

I have the same issue! Any ideas anyone?

Thanks!

[Richard]

Have you taken the valve base plate off and checked for operation off the valve?