It depends on the specific configuration of your HVAC (Heating, Ventilation, and Air Conditioning) system. In many cases, the fan that circulates air throughout your home or building is used for both heating and cooling purposes. Let's consider a typical setup:
Furnace: The furnace is responsible for heating your home during colder months. It consists of a burner, heat exchanger, and blower. When you turn off the furnace, the burner and heat exchanger won't operate, but the blower can still be used to circulate air.
Air Conditioning: The air conditioning system uses the same blower to circulate cooled air throughout your home. The cooling process occurs in the outdoor condenser unit and the indoor evaporator coil. When you activate the AC, the blower is engaged to push cool air through the ductwork and into your living spaces.
In this setup, even if you turn off the furnace for the summer, the blower can still function to distribute cool air from the air conditioning system. The blower operates independently of the furnace's heating components.
However, it's important to note that HVAC systems can vary, and there may be different configurations or additional components specific to your setup. It's always recommended to consult the user manual or contact a professional HVAC technician to understand the specific functionality of your system and any potential limitations.