Does Using AC in Winter Increase Fuel Consumption?

[HazelAnn]

Using AC in winter increases fuel consumption. The reasons are as follows: Turning on the AC switch increases fuel consumption: During winter, pressing the AC button while using the air conditioning does not affect the heating function, but it prolongs the time it takes for the engine coolant to warm up and also increases the vehicle's fuel consumption. Using the AC switch for defogging in winter: When turning on the heater in winter, if fog appears on the car windows and needs to be cleared, the AC switch must be activated. This method quickly removes the fog from the windows. When using the defogging mode, the air conditioning system automatically turns on the AC switch, and it automatically turns off when defogging is no longer needed.