I can now confirm that the pin is connected to the motor and that the black spherical valve head is in the "heating" position... The heating is running perfectly... Kind Regards....
Hiya..... The off/on/timer hotwater pinch switch..... There is a slightly larger but identical one just below it for the radiators..... And, No I have not.... But will asap..... Hopefully speak again.... Thanx ever so!
Dear whoever can help....
I installed a full (18 feed, 4 story) radiator system into my own house 14 years ago. It’s a 1860 building ... I used the Vaillant turbomax 828e...Over the years I have replaced the pressure switch once, the fan assembly once and the PCB once due to a intruding slug...