Do You Need to Turn on AC When Using Car Heater?

[TannerFitz]

You do not need to turn on the AC when using the car heater, for the following reasons: 1. The AC button controls the switch of the air conditioning compressor for cold air. It only regulates the operation of the cold air system and has no relation to the heating system. When you need warm air, simply turn on the heater button to provide warmth. 2. The car heating system warms the air through a water-based heating process. The heat for the warm air mainly comes from the engine's circulating coolant, and it does not use the air compressor. 3. There is no need to use the AC button when heating, as the car's air conditioning compressor consumes fuel. Turning it on would lead to unnecessary fuel consumption and waste.