When you open a fridge or a freezer and then close it again, why does it become harder to open again right after?

Question

When you open a fridge or a freezer and then close it again, why does it become harder to open again right after?

In: 4090

Answer 1

The other answers are typically right, but I know that my freezer (and many others that are “frost-free”) has a fan built in that actually removes air from the inside when the door is closed, to get rid of the moisture. Until the pressure equalizes a few seconds later, the door is very difficult to force open.