I've programmed a calendar on my Stûv P-10, but it doesn't seem to work any more, even though the time slots are still there. Why does this happen?

I've programmed a calendar on my Stûv P-10, but it doesn't seem to work any more, even though the time slots are still there. Why does this happen?

Once calendar programming has been activated, it remains operational except in the following cases:

  • You force the heater to operate outside the initially programmed time slots;
  • You stop the heater during an operating period;
  • The heater displays an error code.