Do You Need to Press the AC Button When Turning on the Heater?

[CaydenLee]

You do not need to press the AC button when turning on the heater. The AC button is the air conditioning adjustment button. When you press the AC button in summer, the air conditioning compressor starts to operate and cool the air. However, when turning on the heater, the AC button does not need to be activated because the heater does not rely on the compressor to generate heat. Instead, the heater transfers the heat produced by the engine into the car's interior without using the compressor. Therefore, there is no need to press the AC button when using the heater. If the heater is kept on continuously in winter, the engine cannot stop running, which may lead to the production of harmful gases inside the car. When these gases enter the car through the heat circulation, they can be harmful to the human body. In such cases, the driver should open the windows to allow fresh air to circulate.