Try this:
To
provide sabbath feature (or to cancel this setting):
1. Push the PREHEAT pad and set the oven
temperature to 500°F/260°C or more using the UP
ARROW pad.
2. Push the PREHEAT pad within the next 2 seconds
for 3-4 seconds. A beep sounds and a number
appears in red to the right of the display. For the
conversion, "3" must be displayed. If another number
is displayed, push the PREHEAT pad and select
"3".
3. Push the UP or DOWN ARROW pad to change
from 12 hour to 9999 in the display, for no 12 hour
shut-off.
4. Push the CANCEL pad to confirm your choice.
Hope it helps! If you need further help, reach me via phone at
https://www.6ya.com/expert/dan_73bbd84fe1d95b61