What is the reason for the sudden loss of cooling in the Buick LaCrosse?

[MariaRose]

The reason for the loss of cooling is a lack of refrigerant; the air conditioning flap is damaged. The function of the air filter has the following 3 points: 1. Provide fresh air: It can prevent the car windows from fogging up, ensuring clear visibility for the driver and safe driving; it can supply fresh air to the passenger compartment, preventing occupants from inhaling harmful gases and ensuring driving safety; it can effectively sterilize and deodorize; 2. Ensure safety and hygiene: It can keep the air in the passenger compartment clean and free from bacterial growth, effectively separating solid impurities such as dust, powder, and grinding particles from the air; it can effectively intercept pollen, ensuring that passengers do not experience allergic reactions that could affect driving safety; 3. Adsorb harmful substances: It can adsorb moisture, soot, ozone, and odors from the air, with strong and durable moisture adsorption capabilities.