Which key is pressed when the car turns on the heating, and the car turns on the heating switch to send out a signal.

The heating switch is generally displayed as a "thermometer" or marked with red and blue colors on both sides. By turning the knob, the red area gradually increases the temperature.

Precautions:

You don't need to press the A/C key to turn on the air conditioner in winter. The AC key is the switch of the air conditioner compressor. When you use air conditioning in summer, you must turn on the AC button, that is, turn on the air conditioning. The warm air only uses the thermal cycle in the car, and there is no need to start the air conditioning compressor at all. So you just need to adjust the air conditioning button, and you can turn on the heater without turning on the AC switch.

Extended data:

Precautions for air conditioning in winter:

In winter, in order to keep the car warm, many car owners close the window for a long time and turn on the air conditioner heater. Although this can ensure the proper temperature in the car and protect people from the cold, it is also easy to cause air pollution in the car. This is because many cars use materials that are easy to volatilize harmful gases, such as asphalt shock absorbers. When the carriage is closed for a long time, the concentration of harmful substances will increase, causing human discomfort. The most direct and ideal way to avoid automobile air pollution is to use healthy and safe body materials.

At the same time, even when the air conditioner is turned on, the windows can be properly opened for ventilation to ensure the benign circulation of air inside and outside the car. However, opening the window will inevitably affect the temperature inside the car. With the improvement of people's health awareness and the progress of science and technology, many cars are now equipped with air purification equipment, which can intelligently detect the air quality outside the car and promote the rational circulation of air inside and outside the car.

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