How Do Refrigerators Work?

But it does not "make cold."

Instead, it moves heat from the inside to the outside.

Inside the refrigerator, there is a special liquid called a refrigerant.

This liquid runs through a long tube, and it changes between a liquid and a gas.

Then a motor, called the compressor, pushes the gas to the back of the refrigerator.

There, the gas becomes a liquid again, and it releases the heat into the room.

Then the cycle starts again, and it repeats all day.

A thermostat turns the motor on and off, so the temperature stays steady.

You can save energy if you do not leave the door open for a long time.