Should the car AC be turned on in winter?

1 Answers
ArcherMarie
07/30/25 3:05am
When using the car's air conditioning in winter, there is no need to turn on the AC switch. The AC switch is required when turning on the cold air in summer, and turning on the AC switch will consume a certain amount of fuel. When using the heater, the air conditioning compressor is not involved; the blower simply directs some of the engine's heat into the car, and it does not consume any fuel. If the AC button is pressed while using the air conditioning in winter, although it will not affect the heating function, it will prolong the time it takes for the engine's water temperature to rise and increase the car's fuel consumption. However, if fog appears on the car windows when the heater is turned on in winter, the AC switch must be turned on to defog the windows quickly.
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