Do You Need to Turn on AC When Using the Car's Heater?
2 Answers
You do not need to turn on the AC when using the car's heater. The heater utilizes the temperature of the vehicle's engine coolant to warm the air before blowing it into the cabin. The AC button represents the air conditioning's cooling function, also known as the air conditioning cooling switch, which is short for air conditioning. Pressing this button activates the air conditioning system to regulate the temperature according to the set level. When the AC is on, the compressor engages, increasing the engine load and fuel consumption. The car's air conditioning system can adjust and control the temperature, humidity, air cleanliness, and airflow inside the cabin to optimal levels, providing a comfortable environment for passengers and reducing travel fatigue.
Honestly, as an experienced driver with 15 years behind the wheel, I think this is quite a common issue. You generally don't need to turn on the AC when using the heater. The AC engages the compressor, which is specifically for cooling and dehumidifying. The heater, on the other hand, utilizes the heat generated by the engine operation, blowing warm air into the cabin through a component called the heater core—no compressor needed. However, when driving in humid conditions, like after rain, the windows tend to fog up easily. In such cases, I briefly turn on the AC to dehumidify, which works quickly and effectively, ensuring clearer visibility and safer driving. I turn it off right after because running the AC increases engine load and fuel consumption. With fuel prices so high these days, every bit of savings counts. Developing this habit is practical—it keeps you warm while saving money.
