ᐅ Bathroom Renovation: Replacement of the Bathtub Faucet

Hello everyone,

I just came across this forum and hope you can help me a bit.
We have bought a house and are currently renovating it, mostly doing the work ourselves where possible.
One of the bathrooms was renovated about 6 years ago and we want to keep it as it is.
However, we noticed that the diverter in the concealed shower valve, which switches water flow between the showerhead and the bathtub spout, no longer works correctly. The diverter pin is located under the lever and is difficult to move or adjust. Also, when using the shower, water still flows from the bathtub spout.
Is it possible to simply replace this part with a different valve, or does it have to be the exact same model?
I have very little experience with this and am unsure what to consider. It’s not just a matter of changing a regular faucet, which wouldn’t be a problem.

Either the selector can be made operational again or repaired, or replaced with original parts.
A picture could help further.

I’m not sure if the diverter can be fixed, but the valve itself seems unusual. Ideally, we would like to replace it completely with a different one. Attached is a picture.

The plumber should handle the replacement anyway, so they can also inspect the faucet for repairs.

Well, I’m confident I can replace the faucet myself. The main challenge is finding a suitable replacement, especially since it shouldn’t be the same model again.

Find out the exact model and then check what the manufacturer offers. The high-end/expensive ones either have a universal rough-in valve for all models (Hansgrohe) or use the same rough-in valve for a range of models. After 6 years, you might still be lucky and find other faucets that fit the valve. With DIY store products, however, you usually have little chance.