Is 'no' on or off for car air conditioning?

[Holly]

no is neither on nor off. The on position for the switch is 'on', and the off position is 'off'. Here is an introduction to air conditioning related content: 1. Operation: Press the ac button, and the refrigeration system of the air conditioning compressor will start working. 2. Location: The car ac button is located below the display screen. Here is some extended information about the related content: 1. Function: Adjust and control the temperature, humidity, air cleanliness, and air flow state inside the car compartment. 2. Components of the car air conditioning refrigeration system: compressor, condenser, liquid storage dryer, expansion valve, evaporator, and blower.

[DiHarrison]

Having driven for so many years, I find that air conditioning button symbols can be quite confusing. Generally speaking, the "ON" marking on a car's AC panel indicates the system is active, while "OFF" means it's turned off. Last time a friend rode in my car, she actually thought "NO" meant on—probably a case of misreading the letters due to light refraction. Most modern vehicles follow international standards, though some older models might use indicator lights instead: illuminated means on, and unlit means off. I recommend paying attention to the sound of airflow and temperature changes at the vents when the AC starts—this way you can judge its status without even looking at the buttons. If you're really unsure, checking the icon prompts on the instrument cluster display is always helpful.

[DelVincent]

When encountering confusion with air conditioning button symbols, I recommend first checking the button's light feedback. The button stays steadily lit when pressing "ON," and the dashboard will display the air conditioning symbol; pressing "OFF" turns the indicator light off. Last time at the repair shop, I heard the mechanic mention that some cars use the "A/C" button as a switch, where the light indicates the compressor is active. Automatic air conditioning is more convenient—just press AUTO, and you don’t have to worry about switching it on or off. However, note that the system automatically shuts off the air conditioning when the battery is low, so it’s normal for the button indicator to be unresponsive then. New car owners often make the mistake of accidentally pressing the AC button when using the heater in winter.

[OSebastian]

When I first bought my car, I also studied the AC buttons. The conclusion is that "OFF" definitely represents the off state, because the design logic of physical buttons is that OFF corresponds to the open-circuit state. In mainstream models now, blue/red ripple icons on the central touch screen indicate that the AC is on, and the icons disappear directly when turned off. Once, when I borrowed a friend's older car, I found it used a snowflake symbol as the switch indicator—when lit, it means the cooling is on. The easiest way is to simply turn the temperature knob—as long as the set temperature is different from the actual temperature inside the car, the AC will automatically start working.