Can I replace the sync motor on this item or do I have to drain the system and change the entire 3 port switch with a Siemens 3PMP-V22 which I have.
Fault is some CH rads hot when HW only on, however system is 25 years old, but them I'm 68!
Alfie
Fault is some CH rads hot when HW only on, however system is 25 years old, but them I'm 68!
Alfie