<human>:  How does a fridge work?
<bot>: A fridge works by using a compressor to circulate a coolant such as Freon through coils or pipes. This cools the air inside the refrigerator, while the heat is vented outdoors using an exhaust fan. The cold air is circulated throughout the fridge section, while warmer air stays in the freezer portion. The thermostat monitors the temperature inside the fridge, and when the temperature rises above a certain level, the compressor automatically turns back on to cool the air.