A:Answer I haven't seen a way to set the alarm, so I assume there's a preset time or maybe the fridge senses if the interior temp starts to rise. I've left mine open a few times. I haven't timed it, but I can take multiple items out of the fridge or unload several small bags of groceries easily. The alarm is a chime, not at all annoying, and repeats every minute or so if you don't respond.