What does 'max' mean in cars?

[AaliyahFitz]

Usually, 'MAX' stands for 'maximum'. When you turn on the A/C cooling switch and then press MAX, the air conditioning system will activate the strongest cooling mode with the blower output at its maximum. Therefore, the MAX button on a car's air conditioning indicates the strongest cooling function, which helps to lower the cabin temperature as quickly as possible. More details about 'max' are as follows: 1. Introduction one: The term 'max' can be seen not only on air conditioning control buttons but also on various fluid reservoirs in the engine compartment. Here, 'max' also carries the meaning of 'maximum' or 'highest', sometimes simply denoted by 'M'. 2. Introduction two: The 'max' marking on fluid reservoirs indicates the upper limit of the fluid level. The fluid level should not exceed the horizontal line corresponding to 'max'. Naturally, where there is an upper limit, there is also a lower limit. 3. Introduction three: The lowest fluid level marking indicates that the fluid should not go below the horizontal line corresponding to 'low'. This is most evident in the overflow tank (i.e., the radiator). The optimal fluid level is between the upper and lower limits.