Should You Press the AC Button When Using the Car Air Conditioner?

[LaLyla]

When using the air conditioner in summer, you must press the AC button first. However, it's different when using the heater. The heater utilizes the car's internal heat circulation system, making use of waste heat, so there's no need to press the AC button. Therefore, remember, when turning on the heater in winter, you only need to adjust the air conditioning button without pressing the AC button. Here is some additional information: 1. The heater relies on the heat dissipation from the engine. There is a small fan in the engine compartment that blows the heat collected by the cooling system into the car. 2. If you don't turn on the heater, this heat will be discharged outside the car. Turning on the heater without pressing the AC button is simply making use of waste heat and will not increase any fuel consumption.