For indoor units ... If you don’t regularly clean an air conditioner’s coils, you may find that the AC is not cooling as effectively as it did. Over time, dirty AC coils will cause the ...

In a “split system,” the most common design, refrigerant circulates between an indoor coil and ... both heating and cooling. In cooling mode, they work exactly like air conditioners.

It returns the cooled air to the indoor ... conditioner or cooling system uses a specialized chemical called refrigerant and has three main mechanical components: a compressor, a condenser coil ...