Kludi New Waves 57 Thermostatic Shower Mixer: Lukewarm Water after Cooperative Reduced CW Temp

Hello.

I inherited the Kludi New Waves 57 thermostatic mixer from the previous owners ( http://www.lazienkaplus.pl/pl/bateria-podtynk...kludi-new-waves-57-719-05-30,54954,165,i.html ) and a warning that if the water temperature is too low, call the cooperative and ask them to change the parameters "at the node in the building" or something like that.

Over the course of several years, the apartment happened two or three times as the previous owner predicted.
It was no different last week. Since then, I have not been able to reach the right temperature in the shower.
So far, after such a telephone intervention, an employee of the cooperative changed something and the problem passed.

Now the Cooperative replies that last week they reduced the CW temperature in the building because "there were overheating" (whatever that means) and at the same time advises to ask the manufacturer of the battery for advice / to look for the cause of the problem in the device itself.

I am posting a few photos of the batteries and I am asking for any advice, because I am green in the subject of plumbing.

Additional information: it was never possible to run cold water in the shower, i.e. with the minimum setting on the thermostat, it was always at least lukewarm.

Thanks.

I assume that the battery is functional, only unregulated. I will describe the procedure for calibrating a different type of battery, I think it should be similar for you. The setting is influenced by the supply water temperature, so if it changes on the node, it will also change in the shower. You start with unfastening the knob or knob. It should have small teeth inside, which allows you to change its position on the axle. You set, for example, 34 ° C and run the shower water, you measure the temperature of the water with a thermometer. The thermometer probably shows otherwise, so you change the position of the knob by removing it from the axis and put it back on so that it shows the same as the thermometer. You change it. water to another and check. You translate one notch if it doesn't match. Finally, you tighten the fixing screw and the plug.

The problem was solved by purchasing a new thermostat.

I advise against purchasing through authorized service technicians, because the price from order to installation can increase by several percent