In message , Spamlet
writes

"DavidA" wrote in message
...
Hi

A Honeywell V4043H1056 2-port motorised valve in our CH system has
stuck. I suspect that the synchronous motor has failed.

A replacement Honeywell motor seems to cost around £25. Screwfix do a
Drayton motor for around £13 (page 420 of Spring 2010 catalogue),
which is supposed to fit many valves.

Please can anyone advise whether the Drayton motor is suitable for
this Honeywell valve?

I did see a post on another forum ('diybanter') that stated:

"Change the motor (for Honeywell, they recommend you get a Honeywell
motor as it they are more robust as their valves can remain open (i.e.
powered) to CH if that was the last demand, even if demand has now
ceased, therefore more wear on the motor)."

Is this really true? I would have thought that a microswitch would
stop the motor when it has reached position.

Best regards

David

Ah, scarcely a week goes past without motorised valve woes. On past form I
would make sure it really is the motor that has blown, before splashing out.
The microswitches are usually the first to go, though it's usually the
3-port valve we hear about.

No its not

the V4043H is a two port valve, the microswitch is only there to provide
feedback that the valve is open


synchron motor failure is a more common failure than microswitches
(except in drayton valves for some reason)
--
geoff