Mixer shower is hard to turn off

[loubylou]

This my first time on here, so apologies if I haven't given enough info or used the correct terms.

I have an exposed thermostatic mixer shower, similiar to the one shown in the link at bottom, but have a problem turning it off. The shower valve handle is very stiff, and is becoming stiffer, it has actually come off before.
I wanted to know if there is a reason for it becoming stiff, or if I should just get the shower valve replaced.

Would be grateful for any advice.

http://www.plumbworld.co.uk/1747-15301

 

[ChrisR]

If you have that particular grand's worth of Mira then the answer is relatively simple, get the right refurb kit from them and replace the relevant O rings etc and you'll have a shower like new.

But if you've got a shed-bought lookalike which cost £150 then it won't be as easy!. It's well worth removing what you can to get at bits which can bind. If you spray with WD40 and it eases a bit, (that won't last) you know that dismantling and greasing with silicone grease will work.

 

[loubylou]

If only I had that exact model, I some how think mine may be a cheap lookalike! Anyhow, thanks for your quick response, I'll see how I get on.