SOURCE: Install trim and adjust the thermostat on a Grohe shower faucet
the temperature adjustment dial cna be rotated when you loosen it, take a thermometer , turn the water on and set the temperature dial to the right temp, then tighten the screw holding it and you're all set
SOURCE: what is service code 1 for a grohe wireless
I had the same Service Code 01. The solution is simple. Switch off the power for the shower for a minute or so usually located outside of the bathroom. Switch it back on and you should hear the unit (if it's close by) resetting itself. Switch on the shower and it will tell you to wait, then with a bit of luck it should wizz into action.
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