It is part of a freezer/fridge and I can't really leave my fridge food out for 24 hrs. So nobody knows?
I would think A would be the lowest setting beings its the first letter of the alph.. mines is all the way counter clock wise would be off.
Put a pot of boiling eater in it and leave the door cracked open if it's part of a fridge/freezer. Otherwise like the first answer, un-plug it.
Unplug it.
