Should the AC Button Be Turned On for Car Air Conditioning Cooling?
3 Answers
To cool the car air conditioning, the AC button should be pressed, as it activates the air conditioning compressor to begin the cooling process. Reasons why the air conditioning may not cool: 1. Excessive refrigerant leading to insufficient cooling; 2. Air in the system causing poor cooling and refrigerant circulation; 3. Insufficient refrigerant; 4. Compressor malfunction. Solutions for air conditioning not cooling: 1. Add refrigerant; 2. Inspect components such as the pipelines, air conditioning pump, condenser, and evaporator box in the car's air conditioning system for damage that may cause refrigerant leakage; 3. Check the compressor; 4. Clean or replace the air conditioning filter. Functions of car air conditioning: 1. Achieve cooling effect through continuous refrigerant cycle transformation; 2. Use engine coolant, waste heat, or heat generated by a burner as a heat source for warming, heating via the heater, and blowing into the car to raise the temperature for heating; 3. Draw in fresh external air for ventilation and air exchange to prevent windshield fogging.
Having driven for over a decade, I find this issue quite common. To get cooling, you must press the AC button—AC controls the air conditioning compressor's switch; only when the compressor is activated can it produce cold air. If you only turn on the fan, you'll get either natural air or engine heat, which is useless on hot days. My routine is to first open the windows for ventilation for a few minutes, then turn on the AC and recirculation mode—this speeds up cooling significantly. Before reaching the destination, I turn off the AC in advance but keep the fan running to prevent mold in the air ducts. Remember to regularly check the refrigerant and cabin air filter to maintain good cooling performance.
A friend asked me about this the other day. Simply put, to turn on the air conditioning for cooling, you must press the AC button. The AC button controls the compressor's activation. Without it, it's like a fridge without power. I've noticed some people only turn on the fan in summer, thinking it's cool enough, but that's just the wind from driving speed. Don't keep the AC on while waiting in the car; it wastes fuel and causes carbon buildup. The AUTO button in the car is quite handy—it automatically controls the compressor and airflow. Oh, and if the windshield fogs up on rainy days, turn on the AC first, then adjust the defroster. Cold air clears fog the fastest.
