If your fridge is left open over night and it wasnt closed till morning and the alarm light does stop flashing when it is closed what does that mean?

Hi and welcome to FixYa, I am Kelly.

FYI... The door alarm will sound anytime the door is left open for more than 4 minutes.

Per your post... What it means your refrigerator is working normally.

However... there is the possibility of having excess ice build up on the evaporator coils from the door being open all night. If the freezer section starts warming up due to poor airflow you may have to do a manual defrost. You would first notice the lack of ice production or soft ice cream if there were air flow problems due to excess ice on the evaporator coils.

To do a manual defrost all you do is:
1. Unplug the unit
2. Remove freezer contents
3. Use a fan directed at the freezer compartment for just over 2 hours (makes a water mess)
4. Reload the freezer
5. Plug in the refrigerator

Everything should be back to normal in just over 4 hours except ice production that can take up to 8 hours.

Thanks for choosing FixYa,
Kelly