Grohe 28 819 000 Shower bar slips out of brackets

SOURCE: Grohe shower assembly leaking

hiit sounds as though the diverter valve is sticking in the mid position although you have turned it to the floor spout as you call it!!
Also it sounds as though the seals are possibly leaking causing the plasterboard (drywall) to get we, or possibly a joint may be leaking. Advice access the pip-work valve etc run shower & check with torch (flashlight) to see where its coming from?
Rectification work replace seals/repair leak...replace diverter valve assembly.

Kindly

Richie (UK)

SOURCE: Grohe 24'' Relexa Shower Swivel Hand Shower Holder broke!

Try going to this web page and looking up the nearest parts carrier in your area.
http://www.groheamerica.com/t/25_3859.html

sanray

SOURCE: Grohe hand held shower head stopped working

This is a simple fix. The tools you need are: cresent wrench. You want to remove the shower hear off of the pipe coming from the wall. On the inside of the end off the shower head there should be a small plastic disk remove it. It will have a series of holes this is called a water saver. The holes get stopped up with minreals take a tooth pick and clean them out. I see this all the time. If that does not work it will be in the valve

SOURCE: Shower will not get hot enough

i have no experience in fixing showers however mine once did this when i remodeled my bathroom so i called one of the guys that was workin on it and he told me that he had takin something out what looked like a gasket and said it was a scald preventer and from then on my shower has been fine hope this helped

SOURCE: leak where Grohe shower head attached to the threaded pipe

using a pair of vice grips wrapped in a soft towel( to prevent scractching) turn the shower head in a counter clockwise direction to remove it then apply liquid teflon (real-tuf) to the threads on the shower arm and tighten the shower head but dont over tighten it liquid teflon is more effective at sealing leaks than teflon tape and it can be wiped clean