Fan Speed How to set the fan speed Prerequisite: The active operation mode is either “Cooling”, “Heating”, “Auto” or “Fan”. User menu screen Navigate to the fan speed menu. Depending on the system, this function may not be displayed. Fan speed screen The setting of the fan speeds will vary based upon the indoor unit model. Press or to adjust the fan speed and to confirm. Fan speeds which can be selected vary depending on the system. 2 fan speeds Auto Low High 3 fan speeds Auto Low High Medium 18