Over the last few weeks, the water temperature in my shower has been rising gradually. At first, the solution was simply to lower the temperature but now I'm afraid that something else needs to be done. Even when set to the coldest temperature, the water that comes out of the shower head is scolding hot. I've been living here for 1,5 years and this is the first time something like this happens. I can still get cold tap water.
I live in an area with lots of calcium in the water (I need to put water softener in the dish washer regularly).
Please find attached a picture of the blender (make: Grohe).
I hope that you can help!