When the car fogs up and you can't see, should you turn on the cold air or hot air?

[ValentinaDella]

When the car fogs up and you can't see, whether to use cold air or hot air depends on the season. If the car fogs up in winter, you should use warm air to defog; if the car fogs up in summer, you should use cold air to defog. Whether it's summer or winter, opening the car windows can quickly remove the fog. If you want to completely eliminate fog inside the car, you can choose to turn on the hot air from the air conditioner and direct it towards the windshield. First, use the external circulation, select the hot air from the air conditioner and the windshield outlet, wait for about 5 minutes, then switch to internal circulation or simply turn it off. The working principle of the car air conditioner is: the compressor sucks in the low-temperature and low-pressure refrigerant gas at the outlet of the evaporator and compresses it into high-temperature and high-pressure gas, which is then discharged from the compressor.