While you wait for answers, we may have found some information which could help you.
Click here for Flush Stopped PumpReplacement of bellows in Grohe air button?
The push button on my Grohe Adagio stopped flushing ?
Short burst of water entering cistern ?
Have I been charged way to much for having a loo mended?
Grohe 42181 toilet filler valve leaking?
how to take unit apart?