What are the symptoms of a faulty car air conditioning controller?

[LaAddyson]

Error codes may appear on the air conditioning panel, or warning indicators may flash or remain constantly lit. Below is an introduction to car air conditioning: 1. Temperature regulation: In summer, the cooling system generates cold air to lower the temperature inside the vehicle. In winter, except for large commercial vehicles that use independent combustion heaters, most vehicles utilize waste heat for heating. Humidity significantly affects passenger comfort, and the humidity inside the vehicle should generally be maintained between 30% and 70%. Standard car air conditioning systems do not have the function to regulate humidity; this can only be achieved through ventilation systems or advanced integrated heating and cooling systems found in luxury vehicles. 2. Air purification: The quality of air inside the vehicle is crucial for ensuring comfort.