Should the car air conditioner be set to recirculate in summer?

[DiJulia]

When using the air conditioner in summer, you can first turn on the external circulation to expel the hot air. Once the temperature inside the car has dropped, you can switch to internal circulation. However, for long-distance driving, it is recommended not to use internal circulation but to keep the external circulation on to prevent driver fatigue, as external circulation allows air flow and keeps the air fresh. Precautions for using the air conditioner: 1. Note 1: Do not blow the air conditioner directly at yourself for a long time when using it, as it is not good for your health. 2. Note 2: When using a home air conditioner, remember to open windows regularly for ventilation to avoid stagnant air. 3. Note 3: Clean the air conditioner regularly. If the evaporator needs cleaning, it is advisable to have it done by a professional. 4. Note 4: Avoid blowing the air conditioner directly after intense exercise, as it may lead to catching a cold. 5. Note 5: Air conditioners come in different grades. Pay attention to the energy efficiency ratio when purchasing, and choose the installation method according to your needs. 6. Note 6: If the air conditioner is not working, it is recommended to check after powering off. Avoid disassembling it yourself, as the internal components are quite delicate. It is best to contact after-sales service for repairs.

[VanEmilia]

When using air conditioning in the car during summer, should you use recirculation or fresh air mode? Here's how I usually handle it: When you first start the car and it's hot as an oven, definitely use recirculation mode! Close all doors and windows tightly, and let the cold air blast into the cabin - this cools things down twice as fast. But don't keep recirculation mode on the entire time. After about 10-15 minutes when you feel comfortably cool, switch to fresh air mode to ventilate. Otherwise, not only will the windows fog up, but the rising carbon dioxide levels in the car will make you drowsy. Pay special attention on rainy days - don't be lazy and keep recirculation on the whole time. Trapped humidity will cause the windshield to fog up and obstruct your view. I usually watch the thermometer and switch to fresh air mode when the interior reaches about 26°C (79°F), while turning down the fan speed a bit - this saves fuel and keeps things comfortable.

[VonEthan]

Using the air conditioner in summer, the recirculation mode is a great helper but don't rely on it too much. The first thing I do when getting in the car is press the recirculation button to keep the heat outside, cooling down significantly in just a few minutes. However, prolonged use can accumulate moisture from breathing and odors, so I usually switch to fresh air mode after 15 minutes of AC operation. Once, I forgot to switch while stuck in traffic, resulting in fogged-up windows and nearly causing a rear-end collision. Now I make it a point to use fresh air mode during rainy days or long trips, pressing the defog button along with the AC for extra safety. If there are elderly or children in the car, opening the windows for a few dozen seconds every hour also helps.

[DelDelaney]

Using the air conditioner's recirculation mode in summer requires a scientific approach. I've tried keeping it on recirculation the entire time—while it cools quickly, after about half an hour, I noticeably feel stuffy and my concentration drops. Now I've learned to use it in combination: start with recirculation to cool down rapidly, then switch to fresh air mode for 5 minutes every 20 minutes once the temperature stabilizes. This maintains air freshness while preventing sudden window fogging—especially crucial when driving on highways during heavy rain, alternating between modes is much safer. Remember to avoid using fresh air mode in areas with heavy exhaust fumes, and switch back to recirculation when passing through tunnels to avoid pollution.

[SanBeckett]

To cool down quickly, turn on the air recirculation! Last summer, I tested it: in a car exposed to the sun, using air recirculation cooled it down 3 minutes faster than using fresh air mode. But the biggest concern is poor air circulation—once when I took my family out, we used air recirculation for two hours straight, and my youngest son said he felt dizzy when we got out. Now I’ve learned my lesson: when using automatic air conditioning, after pressing the air recirculation button, set the temperature to around 22°C, and once it feels cool, switch to AUTO mode—the system will manage the ventilation rhythm itself. Windshield fogging up? Don’t panic, just press the defog button + turn on fresh air mode, and it’ll be cleared in ten seconds.

[Aragorn]

My tips for using the car AC in summer: Use recirculation mode for short trips to lock in cool air, but switch modes for journeys over 30 minutes. Morning commutes benefit from recirculation for faster cooling and fuel efficiency, but always switch to fresh air mode during evening traffic jams – recirculation during peak exhaust hours just draws in more hot air. Here's a clever trick: Keep two damp towels on the dashboard during recirculation; they help cool faster than AC alone. Before rainy season drives, always check your cabin air filter – otherwise musty smells will circulate endlessly in recirculation mode.