The floor near the control module of the floor heating was wet. It was not caused by a leaking radiator valve but the water came from the inners of the Herz control valve where an WTH actuator (art.nr. 1770854) was mounted on. Time to replace the inner valve parts (art.nr. 1 6379 03)! Only tool needed is a metric wrench 18.
Replacing the inner valve of a leaking radiator valve is almost the same thing.
It is a DIY-job of 5 minutes. Please do fill up the system and release the air after you replaced the inners.
20 окт 2023
