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How does a refrigerator work?
Quick answer
A refrigerator works by moving heat from inside to outside, using a fluid (refrigerant) that absorbs heat as it evaporates and releases it as it condenses. It doesn't make cold — it pumps heat away, leaving the inside cooler. A refrigerant cycles between liquid and gas around the fridge.
Step by step
- A refrigerant cycles between liquid and gas around the fridge.
- Inside, it evaporates and absorbs heat, cooling the compartment.
- A compressor pumps the warmed gas to the coils on the back.
- There it condenses, releasing the collected heat into the room.
- Cooling is really heat-moving, which is why the back of a fridge feels warm.
People also ask
Does a refrigerator create cold?
No — it removes heat. It pumps heat from inside out to the coils, so the interior cools while the back gives off warmth.
Why is the back of a fridge warm?
That's where the refrigerant releases the heat it absorbed from inside, dumping it into the room.
What does the refrigerant do?
It carries heat: evaporating to soak up heat inside, then condensing to release it outside, cycling continuously.
How does a fridge stay cold?
A refrigerant absorbs heat from inside and dumps it outside, continuously moving heat out of the compartment.
What does the compressor do?
It pressurizes and circulates the refrigerant so it can release the heat it absorbed.
Part of the guide: Everyday Machines →