Quote Originally Posted by G4RHL View Post
My valve is also a Honeywell and a couple of months back the HW did not heat up. It seemed that the valve had not tripped over to open up the HW circuit. Fortunately I cured it by manually moving the lever backwards and forwards a few times. Something must have caused it to stick. I am reluctant to get a spare in as a backup as when the lockdown is over the long awaited boiler and radiator replacement needs to be effected.
Not sticky here - mechanically it seems fine, but the motor windings have definitely gone open circuit.