Hi we have just had a problem with the central heating coming on whenever hot water was on.
Have checked the 3 Port Valve; Drayton MA1 which was jammed solid. I have removed the actuator (click fit) and replaced the valve, the original was corroded solid. ( have also checked pump and removed scale/corrosion)
Replacing the actuator and filling the system, we seem to have the same problem.
Could the jammed valve affected the actuator?
Is there a way of testing it? Have tried switching on HW on its own and nothing happens to valve, switch off and switch on CH nothing happens to valve but, pump starts running and boiler flashes. I am filling a hot bath to see if valve opens to HW when pump & boiler comes on. If not would I be right in thinking actuator is duff and a replacement needed
Have checked the 3 Port Valve; Drayton MA1 which was jammed solid. I have removed the actuator (click fit) and replaced the valve, the original was corroded solid. ( have also checked pump and removed scale/corrosion)
Replacing the actuator and filling the system, we seem to have the same problem.
Could the jammed valve affected the actuator?
Is there a way of testing it? Have tried switching on HW on its own and nothing happens to valve, switch off and switch on CH nothing happens to valve but, pump starts running and boiler flashes. I am filling a hot bath to see if valve opens to HW when pump & boiler comes on. If not would I be right in thinking actuator is duff and a replacement needed