Why does a room heat up when you leave the freezer open?

Answer

Day Valentine

In a freezer, such as in a refrigerator, heat is taken and dissipated to the outside of the freezer/refrigerator. That is why it should not be too close to the wall, or too enclosed, otherwise it would get too hot on the outside. In other words, the heat from the freezer is simply discharged outside, but it is not lost (conservation of energy).

I will not go into the principle of maximum vapor pressure and unsaturated vapor behind the cooling effect, but the bottom line is that everything is done via a pump that requires electrical energy. And this pump also generates heat when it is running.

If you leave a freezer open in a room, the heat from inside will be dissipated to the back or side of the freezer, which is also in the room, so no heat will be extracted from the room as a result. But if you leave the freezer open, that pump that has to cool down runs all the time, and it converts a very large part of its electrical energy into heat, which therefore enters the room as an extra. As a result, the room heats up instead of cooling down.