After two years of having the central heating operating by sticking my diverter
on open (manual) and setting the hot water on I decided to replace the dodgy
synchon motor. Tootled along to Wickes (£7 above what I should have paid) and
picked up a nice shiny new one. Fitted it this morning during the Wales game.
Anyway ..... the motor doesn't seem to be doing very much but everything seems
to be working!. If I put the HW on by itself it will move the valve if it is
out of position. However, no combination of HW, Central heating etc will move
When I put the central heating on I can hear one of the two micro switches at
the end of stroke position operating (electrically rather than mechnically
presumably as the manual adjustment bar at the back hasn't moved).
Should the micro switch kicking coincide with the motor turning in the opposite
direction to move the valve? Does the fact that the micro switch is operating
but the motor does not turn mean that the minute little 3/4 component circuit
board is either knackered or has a dry joint somewhere?
It's a standard HW tank sensor, a single room sensor, 3 way valve with a
Honeywell 9210 valve controller.
Anyway, after the diverter valve did move when I set it to HW, the radiators
are working fine, the room sensor is happily telling the system to fire the
boiler and all appears well. I'm not so sure it is working as intended though?
Any advice/comments greatly welcomed!