It's usually the CH that gives problems with 3 port valves, because the valve does not move across to the correct position or if it does the micro switch contacts don't make and stops power coming out through the orange wire.
The micro switches have no bearing on operating for Hot Water.
If CH has not been switched on, the quadrant (which turns the valve) is spring loaded and will return to the HW position.
If the quadrant/valve is stuck at CH and the spring can't return it, then that would have an effect.
The lever is there for a special purpose, nothing to do with the boilers operation. When the system needs filling, both ports need to be open so the lever is used (power is off) to turn the quadrant. There will be resistance due to the return spring and the motor. The lever is put on a latch(manual) and later put back to 'auto'.
If the quadrant is at mid position, then the lever will be floppy.
Perhaps you should be more specific regarding the problem you're having with 'hot water'.
If the boiler does not light when HW is selected, then you need to be looking at the cylinder stat.
The micro switches have no bearing on operating for Hot Water.
If CH has not been switched on, the quadrant (which turns the valve) is spring loaded and will return to the HW position.
If the quadrant/valve is stuck at CH and the spring can't return it, then that would have an effect.
The lever is there for a special purpose, nothing to do with the boilers operation. When the system needs filling, both ports need to be open so the lever is used (power is off) to turn the quadrant. There will be resistance due to the return spring and the motor. The lever is put on a latch(manual) and later put back to 'auto'.
If the quadrant is at mid position, then the lever will be floppy.
Perhaps you should be more specific regarding the problem you're having with 'hot water'.
If the boiler does not light when HW is selected, then you need to be looking at the cylinder stat.