Replacement exposted Bar Mixer or new shower

[G1nzo]

We have a exposed thermostatic shower mixer bar which has decided to give us a hard time
It used to be set at the right temperature
Now we have to turn the temperature control right up to get hot water
Then it turns cold
Is there a decent replacement available
One with an outlet on the top for the main fixed shower head and another on the bottom for the hand held shower head
150mm centres
Or is it just easier to get a complete replacement shower
Need to act fast as plumber is here next week for other work

 

[Hugh Jaleak]

I'd be checking the filters in the shower inlets and your supplies before condemning the valve, it is possible the shower is being starved of a hot supply. Isolate supplies, remove the valve and turn hot supply back on, see what sort of flow you get. Also check if a filter is fitted in the valve inlet, it is clean.