All was well until I bled a rad the other night. Now we get CH as per programmed but no hot water on demand. Had a look in the boiler (getting quite familiar with it now!) and the actuator comes out of the 3 way diverter and presses the microswitch, but the boiler doesn't fire up. If the heating is on at the time, the boiler just goes out ans stays out, and then doesn't come back on for the heating.
I took the DHW microswitch and activated it manually and it fired up - got the missus to then turn a hot tap on and the boiler went out!
Any ideas what's going on?
(its an Ideal (!) c80ff if it helps)