My sister has one of these valves on her central heating system. Firstly is it a 3 way valve or is it a 2 port valve as I think it is the latter.The problem is that her central heating comes on when the room stat is off.I have taken the actuator head off and it clicks round when room stat turned up so seems to be working.The body part of the valve also seems ok as thevalve turns freely.Is it possible for the for the valve not to sit properly in the body.Also is it a motorised valve that gives either hot water only or central heating only or can both be on at the same time.If it is faulty what is the best replacement.
thanks
mark
thanks
mark