How to Turn on Car Air Conditioning in Winter?

[OAmir]

Here are the steps to use car air conditioning in winter: 1. Start the engine for preheating. 2. Turn on the heater when the engine coolant temperature reaches above 40°C. 3. Activate the external circulation to expel cold air from the cabin. 4. Switch to internal circulation. The working principle of car air conditioning heating is that when the engine coolant temperature becomes sufficiently hot, the refrigerant gas enters the condenser, where its pressure and temperature decrease, causing the refrigerant gas to condense into liquid and release heat. Car air conditioning maintenance tips: 1. Avoid setting the temperature too low. 2. Adjust the air outlet direction. 3. Do not use it for extended periods. 4. Occasionally use high fan speed. 5. Turn off the air conditioning when driving at low speeds.

[DiLilliana]

There are indeed some tips for using the car heater in cold weather. I usually let the engine warm up for three to five minutes first, and turn on the air conditioning only after the temperature gauge needle rises. Don't rush to press the AC button—that's for cooling. Turn the temperature knob to the red zone, set the fan speed to level 2 or 3, and aim the vents at your feet for the most comfort. If the windshield fogs up, press the defrost button, and the airflow will automatically switch to the windshield. Once the car is warm, turn off the external air circulation to save some fuel. Remember, the heater uses the engine's heat and doesn’t consume extra fuel, so feel free to use it. Once, I turned on the heater before the engine warmed up and ended up shivering from the cold air blowing for a long time—now I’ve learned my lesson.

[Brynlee]

Using the heater in winter is actually quite simple. After starting the car, don't turn on the AC immediately—wait for the tachometer to settle down first. Setting the temperature around 26°C is the most comfortable; I usually direct the airflow toward the windshield and feet. If there are many people in the car, turn on the external circulation for ventilation, but remember to switch to internal circulation on highways to prevent window fogging. Avoid pressing the AC button—it's meant for summer use. Don't panic if you smell plastic when first turning on the heater; it's likely dust buildup in the evaporator—just open the windows for a minute to clear it. Avoid wearing overly thick down jackets, as extreme temperature differences can cause drowsiness.