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this is explained WRONG The refrigerant enters the evaporator coils as a LIQUID, and then absorbing heat becomes a gas, the compressor then turns this into a higher pressure higher temperature gas, going through the condenser coils, cools (releasing heat) back into a liquid, the expander lowers the pressure and temperature. expander lowers pressure (lowering temp and boiling point, as lower pressure makes anything easier), compressor raises pressure (and increases temperature and raises condensation point, making it easier for it to turn back into a liquid) evaporator coils are where the refrigerant (as a liquid with a lower boiling point) absorbs heat and evaporates, the condenser coils are where the high pressure high temperature gas releases heat and condenses back into a liquid.
