Does the AC fan speed affect fuel consumption?

[DiCollin]

There is a difference in fuel consumption based on the AC fan speed setting. Higher fan speed leads to higher fuel consumption: The fan speed doesn't affect the compressor's workload, but it's related to the blower motor. Higher fan speeds require more power from the blower motor, while lower speeds need less. Therefore, increasing the fan speed will result in higher fuel consumption. Lower AC temperature increases fuel consumption: For variable displacement compressors, lower temperature settings force the compressor to maintain high displacement for longer periods, increasing fuel consumption. When the temperature is set higher, the compressor can reduce displacement, decreasing engine load and fuel consumption. With fixed displacement compressors, setting the temperature too low forces the compressor to work continuously, also increasing fuel consumption.