Grohe valve comes on and won't turn off - Plumbing

Grohe Flush Valve Replacement

Sounds like the screen is plugged or the check stop is not working correctly

You may have a build up on the valve,which is constricting the water flow. Sometimes you can take them out and clean it. Or you can replace it with a new one. The other problem might be your water heater. Does the water come out hotter in other faucets in yout home ?

If that is the picture,front of valve(escuthoen)should come off with small flathead screwdriver or pointed knife.Screw underneath-tighten her up

http://docs.homeclick.com/PE-Links/Grohe/Grohe-19614-manual.pdf

1. Turn thermostat handle (L) to the 100 °F (38 °C) safety

check, see fig. [6].

2. Unscrew handle (N) or lever (O).

3. Unscrew cap (M).

4. Pull off thermostat handle (L).

5. Remove screws (H) and escutcheon (G), see fig. [4].

6. Close both isolation valves (I).

7. Pull sleeve (F) from the mixer shank by pressing

down the tongue (D2), see fig. [7].

8. Extract clamp (D1).

9. Pull stop ring (D) until resistance is encountered

(approximately 3/8" [10mm]), see fig. [8].

10. Unscrew stop ring (D) complete with regulator

nut (K).

11. Unscrew thermoelement (47 050, 47 582) with 24mm
open-ended wrench, see page 2.

It is not too clear to me, but I'm not looking at it. lol
Gary

The thermostatic stop is set too low. Havent set a grohe before but most other thermostatic shower valves work similar. pull off the handle(however a grohe handle comes off . . ) there should be a notched ring or stop which keeps the handle from going all the way hot. pull out the ring and turn it a few teeth hotter put back and reinstall handle try water temp and adjust again if necessary.

your answer should totally be in the instructions of the valve that should have come with the valve,..good luck

there should be a flat head screw on the mixing valve turn the water on and turn it to the desired temp,, it is letting to much cold water in , if this does not work replace the mising valve

they normally come in the box but i beleive the valve body is marked. they are not on off valves they are a mixing valve make sure you have volume controls or they wont work in most cases

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)