Should the AC be turned on when driving in winter?

[CarterLynn]

When driving in winter, the AC should not be turned on. The AC is the cooling switch of the car's air conditioning system. When the car's air conditioning is heating, the high-temperature coolant from the engine flows through the heater core. At this time, the air blown by the blower also passes through the heater core, allowing the air conditioning vents to blow warm air. The heater core is essentially a heat exchanger. If you want the air conditioning to produce heat, you only need to increase the temperature setting and select an appropriate fan speed. When the car's air conditioning is cooling, the AC button needs to be pressed. At this time, the engine drives the compressor to operate. The compressor continuously compresses the refrigerant and delivers it to the evaporator. The refrigerant expands and absorbs heat in the evaporator, cooling the evaporator. The cooled evaporator then cools the air blown by the blower, allowing the air conditioning vents to blow cold air.