Brocken Thermostat Replace

The standard thermostat usually brakes because of the nonrigid design.
The easy and safe way is to replace it with the cap shown.
To adjust the valve opening insert some 2 Euro cent coins.
Thereafter turn it as long as needed to feel the correct temperature of the heating.
Depending how many coins you need the overall cost will be between 4 to 10 Euro-Cents.