How much water can you turn on the heating?

80 to 90 degrees Celsius. According to the Pacific Auto Network, when the water temperature reaches 80 to 90 degrees Celsius, the warm air function of the car can be turned on. When the automobile air conditioner is heating, it relies on the antifreeze of the engine to provide heat. If the warm air is turned on too early, it will lead to the slow temperature rise of the coolant, increase the warm-up time and affect the engine protection.