BMW 540i AC not cooling despite extensive repairs costing over 2000 on BMW 540i

Some BMW 540i owners report experiencing ongoing issues with their air conditioning systems not cooling effectively, even after extensive repairs costing over $2000. Common causes for this problem include refrigerant leaks that hinder normal AC operation, as well as potential overcharging of the refrigerant, which can lead to high pressures and ineffective cooling. Additionally, electrical climate control issues, such as faulty blend door actuators or compressor problems, can further impact performance. To resolve these issues, owners are advised to check for refrigerant leaks, ensure proper refrigerant levels, and verify the functionality of the air conditioning compressor. Given the significant repair costs without resolution, consulting a specialized BMW mechanic or dealership may be necessary for accurate diagnosis and a lasting solution.