I have a problem with my gas central heating. Following the design parts. A. Conventional Boiler B. Pump C. 3 port motorised valve. D. Room Thermostat. E. Cylinder Thermostat.
Problems:-
- The 3 port diverter valve only moves visually when the heating is turned On.
- It does not move when you try to bring the H/W On with it.
- The boiler does not cuts off or On from the Room Thermostat.
- The boiler comes on or Off with its on thermostat.( Boiler Thermostat.)
- The boiler comes on even without programming for C/H.
I suspect the 3 port motorised valve but I can not explain to myself why?. please help me.