Hi all,

I have a 25 years old bath faucet Friedrich Grohe. I serviced it to certified professional 3-4 years ago and was working properly up to now.
When returning from 3 weeks holidays it started malfunctioning.
Actually the button that assignes the flow to the main faucet or the shower works partially. The flow is 30%-70% or the opposite. Before was working 0-100%
Is there a technical manual to fix it? Any idea or consulting welcome.

Best

Dimitris

Yes, this is very (very) outdated faucet... This faucet is very sensitive on dirt... The faucet has screens inside ( filters ) that prevent debris that travels though your house plumbing to enter interior of the faucet. I assume those screens are clogged with small debris. You have to take it apart and clean the filters... Also, clean filter at shower head... Yes, agree, it is not for a novice to service FG faucets.. I have been dealing with them for at least 25 years and have to admit - every service call involving FG product is a challenge... Good luck.. Let me know how you did... Back to you... Milo