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592. Which of the following correctly describes how an air-conditioner in a vehicle should be used and maintained?
- Turn on the air-conditioner at full and then turn it down to a lower level.
- Replace the coolant every six months.
- The ideal temperature setting for an air-conditioner is 16°C.
- Operate the air-conditioner in the outer air inflow mode for greater cooling efficiency.
Answer : 1