How often should an air conditioner fan run?

An air conditioner fan should typically run whenever the system is cooling, which means it operates during the cooling cycles. Many homeowners opt to set the fan to "Auto," allowing it to run only when the AC is actively cooling, which saves energy. Alternatively, setting the fan to "On" keeps it running continuously, providing better air circulation and filtration but may lead to higher energy bills. Ultimately, the frequency can depend on personal comfort preferences and energy efficiency goals.