Do You Need to Turn on AC When Using Car Air Conditioning in Winter?

[Marian]

In winter, you don't need to turn on the AC when using car air conditioning. The reasons are as follows: 1. The AC button is the switch for the car air conditioning compressor, which is only needed when cooling in summer. Pressing the AC button activates the compressor to start cooling. The heating system, however, utilizes the internal heat circulation principle of the car and does not require the air conditioning compressor. To use the heater, you only need to adjust the temperature button and turn on the blower. Therefore, there's no need to turn on the AC switch when using car air conditioning in winter. 2. If the AC switch is turned on while using the heater in winter, it generally won't damage the engine, but it may lead to increased fuel consumption or higher water temperature.