Shower / bath valve running cold

[RBB]

Hi , if you have time I’d be really grateful if someone can answer this question so I know what to buy and what to ask a local tradesman to price for . Have a bath / shower mixer valve which is Grohe , it must be 10 years old , they are a great company to deal with and have sent me a new grub screw which I though would stop the wobble on the handle ( see vid ) but I can’t get it fixed in place as i guess it’s just old now . Don’t care about the wobbly handle but when you run a bath the water runs cold . We have an oil combi ( pic attached ) but the kitchen tap & basin tap in bathroom seem to run hot ok . So my question is , do you think it’s the shower valve that needs replacing / and the wobbly handle that is doing it or the valve is just knackered - thank you

 

[HoodedClaw]

What shower is it - most likely the thermostat in the shower valve.

 

[RBB]

It’s a grohe , but I’m not sure it’s thermostatic ? Or are they all ?

 

[moonlight]

Sounds like its a thermostatic shower valve, you may be able to still buy the inner's for the valve. Send Shower Dr images, and the description of your problem.

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Identify my Shower or Cartridge | The Shower Doctor

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