:D
Problem solved , all caused by poor connection within programmer sending wrong signal to wiring centre . Cleaned contacts tightened connection , problem solved !!!!!
Valves not stuck as I have had the power head off and manually moved it to just heat due alone . When switching between program's the head does not change position and all ports from the wiring centre remain live ?
I'm thinking either the printed circuit board in the wiring centre has...
:?: I have a glow worm flexi com 30HX with a climapro room stat wired from a smart wiring centre, I also have a 3 port valve.
Having had this system running faultlessly for the last 4 years has been wonderful !! .... But this year when I turned of the heating and leaving the dhw just running ...