Why are cars warm and cold in winter? What is the reason?

Now the weather can be said to be very cold, and driving in such cold weather, it can be said that many people will choose to turn on the air conditioner to keep warm, so why is the warm air in the car cold in winter?

First of all, it's because your air conditioner is not hot enough. To be precise, the temperature of the water tank is not enough. As we all know, the water in the water tank will go through a small cycle, and then it will go through a big cycle after the water temperature rises. However, the water temperature can't rise so fast in winter. At this time, if the air conditioner is turned on, the car will blow away the only heat in the engine, making it more difficult for the water temperature of the car to rise, which will also increase the fuel consumption of the car.

The second is that your car hair dryer doesn't work, because the car hair dryer is broken, so your car doesn't actually have air conditioning on, or the cold air coming in from outside is blowing, so it will feel cold.

Finally, maybe you turned on the wrong air conditioner. You should have turned on the heating, but you didn't adjust it properly. Therefore, the air conditioner actually doesn't work. So look carefully at whether it's your own problem or the car's problem.