Take it off and see if it spins.

"Daniel" wrote in message
...
Hi,

Ok, I've opened up the actuator to find the Syncron motor. The unit is
warm, and you can feel a slite "humm" in it. Are the Syncron units all
the
same, I found one on Screwfix for 7.99

"Tony Bryer" wrote in message
...
In article ,
Christian McArdle wrote:
Heads often don't cost much less than the complete valve, so you
might consider buying the whole thing, so that if it turns out
that the valve itself is knackered, you've already bought the bit
and can reunite the new head and valve.

IME it's easier to replace the Synchron motor (£10+VAT or so),
especially if the lead on the existing head disappears into a rats
nest of wires.

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm