For any shower problem, I've had a lot of success looking to showerdoc.com.
There's a soares section on their website that has loads of brand and model specific questions and answers. You'll need to rummage around a bit on the site.
Dfgui
May 2023
Automatic Answer
While you wait for answers, we may have found some information which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix plumbing.