Do you need to turn on the AC when using the car air conditioner in winter?

2 Answers
EverettAnn
09/01/25 2:36am
You do not need to turn on the AC when using the car air conditioner in winter. The suitable temperature for the air conditioner in winter is around 20 degrees Celsius. The method to turn on the warm air is: 1. After starting the car, wait for the water temperature to rise to the normal temperature, then turn on the warm air switch; 2. Adjust the air circulation mode to the internal circulation mode; 3. Set the air conditioner to the appropriate position and adjust the air direction. The functions of the car air conditioner are: 1. Adjust the temperature, humidity, air flow direction, and speed inside the car, and improve the air quality through the filter; 2. Provide a comfortable riding environment for passengers and reduce travel fatigue; 3. Create good working conditions for the driver to ensure safe driving.
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LaMiguel
09/13/25 5:33am
I've been driving in winter for years, and I can tell you that you don't need to turn on the AC when using the heater. The AC is meant for cooling, while in winter we use the heater for warmth—the hot air comes directly from the engine's residual heat. Turning on the AC only forces the compressor to work, wasting fuel unnecessarily and potentially accelerating system wear. My advice is to simply turn the temperature control knob to the highest setting, turn on the fan, and the hot air will come. If you encounter foggy windows, like when starting the car in the morning, you can briefly turn on the AC to help dehumidify. Once the fog clears, turn it off immediately. This saves fuel, protects your car, keeps the interior warm, and is simple and hassle-free. After years of driving, I've found this method works great. Remember, the heater is free—don’t waste money on the AC unless it's an emergency defogging situation.
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