Problems with the CH & HW at Handyman Towers.
Water is getting far too hot,although tank stat is turned down, rads not hot enough at times.
Seems to be the 3 port valve (1 in, 1 to tank, 1 to rads)
Having read the fault finding guide on the interweb, I removed the actuator and turned the spindle by hand. The destructions state;
"If power is present on the appropriate wires and the actuator still doesn?t operate as expected, remove it from the valve and see if it motors to the correct positions when off the valve".
But it doesn't say what the 'correct positions' are.
"If it doesn?t, then it?s a faulty actuator. If it does, check the valve spindle is free to rotate using your fingers only. If you require pliers or grips to move the spindle, then the actuator will be unable to turn it".
You can turn the spindle by hand, albeit a little stiff. However, when the actuator moves in the direction of the CH port, it stops half way & clicks.
Sounds like a duff actuator to me, but I don't want to shell out £75 if its the valve.
I assume changing the vale is a drain down job?