motorised valve problem again I think ?

[Hammish]

Hi,
I have a glow-worm spacesaver 50brmk11 and had problem with HW not heating up. This was three years ago when I posted here for help and was advised the motorised valve could be sticking. The advice was spot on as I located the valve and gave it (Whit Fir) with a good shaking with both hands and to my delight, unstuck the valve and have been living ever since, well up until now
The HW now heats up when just the CH is on so I presume that the valve has got stuck again. Have tried the Whit Fir several time but to no avail. So looks like I need new valve which I think I can fit myself as there is no gas to deal with.
Can anyone advise what type of motorised valve or part number I would ask for and where I can purchase one or can the valve be taken of and cleaned or something.
Thanks,
Hammish.

 

[mark.neale]

What make and model of valve do you have at present?

 

[Hammish]

Located model number (SUNVIC SD2701) and by reading other posts in the forum got to Sunvic website who have this model listed Contacted them by phone and can supply through company such as Graham's, who have an account with them. Just hope they don't add to much to the list price
Thanks