The answer to 'what does condenser do' is the condenser is a key component of an HVAC system that helps remove heat from the refrigerant and transfer it outside the home. The condenser coil is located outside the home and works with the compressor to turn the refrigerant from a gas back into a liquid, releasing the heat it absorbed from inside the home.
The condenser fan pulls air across the condenser coil, allowing the heat to dissipate outside. This helps the refrigerant cool down and condense back into a liquid so it can continue cycling through the system and absorbing more heat from the indoor air.