The answer to 'what does evaporator coil do' is that the evaporator coil is a critical component of your HVAC system that plays a crucial role in cooling your home. The evaporator coil is located inside the indoor unit of your air conditioning or heat pump system, and it is responsible for absorbing heat from the air inside your home.
As warm air from your home passes over the cold evaporator coil, the coil absorbs the heat, causing the air to cool. The refrigerant flowing through the coil absorbs this heat, and as it does, it changes from a liquid to a gas. This process of heat absorption and refrigerant phase change is what allows your HVAC system to effectively cool your home.