Biasi Advance - still heating hot water when tap off

[xd400]

Biasi Advance 30C. Uses one of those new electronic detect flow switches clipped onto the pipe. Blue plastic with a small pcb showing a few transistors.

Even though the hot tap has been turned off, the boiler is still showing as tap open (flashing tap icon) and continues heating it until max temp hit and once that cools, starts again.

If you switch off from mains and back on all is well. It only happens very rarely but a pain as obviously water comes out of tap dangerously hot and also not great for the boiler or energy use.

Is it the switch itself or the way it's clipped on?

 

[CBW]

Not a boiler I’m familiar with, but I’d say something is sticking giving a false tap demand signal. Usually a sensor or magnet.

 

[ianmcd]

swap the flow switch out