Yes, it is normal for the outdoor section of an air conditioning unit, specifically the condenser, to expel hot air while the interior fan blows cooler air. This is a fundamental principle of how air conditioning systems work.
The outdoor condenser unit contains the compressor, condenser coil, and a fan. Its primary function is to release heat absorbed from inside the building to the outside environment. The compressor compresses refrigerant gas, causing it to become hot. The hot refrigerant then flows through the condenser coil where it releases heat to the outdoor air. The fan helps dissipate the heat by blowing air over the condenser coil, which results in hot air being expelled from the unit.
On the other hand, the interior unit of the air conditioner contains the evaporator coil, which is responsible for cooling the air. The cooled refrigerant flows through the evaporator coil, and the indoor fan blows air over the coil, causing the air to become cooler. This cooled air is then distributed throughout the building to provide the desired cooling effect.
So, it is completely normal for the outdoor section of an air conditioning unit to expel hot air, while the interior fan blows cooler air to maintain a comfortable indoor temperature.