Hello. I have a Monarch Mini Aqua HE which, every time I go on holiday, I disconnect the power for safety reasons. Avery time I have come back, it has switched back on and started working. This time, however, it seems not to be working (water is cloudy in the kettle). The display time was flashing and I reset the time and I've tested the region function, which works fine. However, there is number 1435L displayed to the right of the time. Does anyone have any ideas on what that might indicate?