Honeywell motorised valve issue

[TurbineUK]

Hi all.

I've got a problem where my boiler is running 24/7. The issue seems to be with the Honeywell motorised valves. On 2 of the 3 zone valves, there's no resistance when using the manual lever, so I assumed 2 of the valves were stuck open. However, I've taken the motor off and there's still no resistance and the spring doesn't do anything. On the working one it pulls the lever back and closes as expected.

Am I just unlucky that 2 have broken and need replacing, or is there a way to get it working again / something else to try?

Thanks

 

[Exedon]

If you have the heads removed and they are not spring returning time for new heads.
Make sure the actuator in valve actually moves should move with your fingers .

 

[TurbineUK]

They move easily so the valves are okay. Looks like new heads then - annoying, but I suppose if they're the same batch it's not that surprising they both failed. I think they've actually been broken for a few years, but I always assumed the boiler was heating the water until I recently changed the schedule and realised it didn't ever go off!

Thanks for the reply.

 

[Echo the husky]

As above it is likely the valves need replacing, but before you buy new valves, cut the mains power to the entire heating system. If they spring return then, you have a wiring fault, if they stay as they are they need replacement.

 

[TurbineUK]

Thanks. Just tried that and they didn’t move, so ordered 2 replacements.