How to Turn on the Heater in a BMW 523?

[SanAna]

To turn on the heater in a BMW 523, follow these steps: Simply increase the temperature setting and then select an appropriate fan speed. There's no need to press the AC button when using the heater. Below is some relevant information about automotive air conditioning systems: 1. The car air conditioning system is an important comfort feature in vehicles. It can provide both cooling and heating functions, with relatively simple operating principles. When cooling, the engine drives the compressor to operate, which continuously compresses the refrigerant and delivers it to the evaporator. Inside the evaporator, the refrigerant expands and absorbs heat, thereby cooling the evaporator. 2. When 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 car's air vents to blow warm air.