My three port valve (Landis & Staefa MA-V322C) gets very hot and buzzes. It seems to be stuck in the HW position. If I take the head off put into manual mid-position, I seem to get both HW and CW. Can I assume the actuator motor has expired and just needs replacing or should I do more checks? I am reluctant to just replace and hope.
3 port valve problem
Collapse
X
Comment