TRV reading but not actuating fully
I have a separate lounge and dining room with an open doorway between. Both are on identical schedules but the lounge is controlled by a temperature sensor and the dining room by its trv.
The dining room trv appears to have virtually stopped actuating the valve and is letting the lounge to heat it up.
Occasionally the trv actuates for a brief moment then switches off. I have turned it up manually and it worked fully when I did this but reverted to not doing when back on schedule.