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What Causes the Car Air Conditioner to Turn On Automatically?

1 Answers

DeNevaeh

07/29/25 6:08am

The car air conditioner may turn on automatically due to reasons such as not turning off the air conditioner before parking the car or setting the air conditioner to automatic mode. Solutions for the car air conditioner turning on automatically: Turn off the A/C switch before shutting down the engine, and the ventilation can be delayed or left on, so the next startup will remember the previous state. Turning off the A/C before parking can also reduce the occurrence of air conditioner odors. Precautions for using the car air conditioner: The car air conditioning system is basically unused during winter. Before the initial startup, check the belt tension. After prolonged use, the air conditioning system should undergo dust and bacteria removal. Observe the engine coolant temperature after running the air conditioner for a while. If the temperature rises abnormally, stop the air conditioner promptly. Methods for maintaining the car air conditioner: Regularly check the refrigerant and compressor oil, adjust the low-pressure side pressure of the air conditioning system to 2-3 bar and the high-pressure side pressure to 15-25 bar, clean the condenser, and wash the surface of the evaporator. Correct usage of the car air conditioner: Turn on the A/C switch, adjust the air outlet selector knob (point the vents upward when cooling and downward when heating), adjust the fan speed switch, adjust the air recirculation switch, and adjust the temperature control knob.

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