What should be noted when using car air conditioning?

[LolaRose]

Precautions for using car air conditioning are as follows: 1. Do not set the air conditioning temperature too low. Excessive temperature difference between inside and outside the car can easily cause the driver to catch a cold, while excessively low temperature may also pose a risk of arthritis for passengers. 2. Control the direction of air vents. Based on the principle that cold air sinks and hot air rises, when controlling the air vents, owners can follow this guideline: point the vents upward when cooling and downward when heating. 3. Do not turn on the air conditioning immediately after the car has been exposed to the sun. After being exposed to the sun, the temperature inside the car is usually very high. It is best to open the windows for ventilation first and wait for the hot air to dissipate before turning on the air conditioning. 4. Turn off the air conditioning before shutting down the engine.

[StVanessa]

Seeing you ask about car air conditioning usage reminds me of the experience I've accumulated over years of driving. Don't rush to turn on the cold air immediately after getting in the car, especially after summer sun exposure when the interior feels like a steamer. First, open the windows for ventilation for two to three minutes before turning on the AC - this cools faster and protects the compressor. Don't set the temperature too low; maintaining about a 7-degree difference from outdoor temperature is most comfortable, otherwise you might catch cold or get joint pain. Turn off the cooling five minutes before parking but keep the fan running to dry the air ducts and prevent musty odors. Remember to run the fan at high speed for a few minutes during seasonal changes to remove dust, and replace the cabin air filter at least annually - otherwise the air blowing out will be full of bacteria. Always switch to recirculation mode during traffic jams to avoid sucking exhaust fumes into the car.

[SanAniyah]

As a car enthusiast, I must remind you that safety is the top priority when using car air conditioning. Leaving the AC on for extended periods while parked can drain the battery and may lead to carbon monoxide poisoning. If you notice the vents blocked by debris, clear them immediately - obstructed airflow reduces cooling efficiency and increases fuel consumption. Don't turn on the heater immediately after cold starts; wait until the coolant temperature gauge reaches the midpoint. When using recirculation mode for over an hour, switch to fresh air mode to prevent oxygen deficiency and drowsiness. Never directly spray water into the AC intake during car washes to avoid electrical short circuits. Regularly check refrigerant pressure and repair any leaks promptly.

[SanAniyah]

My wife always complains about getting carsick, and later we found out it was due to improper use of the air conditioning. When the AC is first turned on, avoid directing the vents straight at the face; instead, adjust them to blow toward the windshield. Large temperature differences are most likely to cause dizziness, and around 26°C is the most comfortable setting. Switch to the outside air circulation mode for two minutes every half hour to keep the air fresh. Extra caution is needed when traveling with children—avoid letting infants and toddlers be directly exposed to cold air. Personally, I make it a habit to insert an antibacterial stick into the AC ducts, replacing it every three months, which effectively prevents unpleasant odors. Turning off the cooling function before parking is especially considerate for the elderly and children, avoiding a sudden temperature change when getting out of the car.