What is the solution for BMW 740 air conditioning not cooling?

2 Answers
David
07/25/25 5:07pm
The solutions for BMW 740 air conditioning not cooling are: 1. Appropriately reduce the refrigerant amount; 2. Check if the condenser pipe has dirt and clean the condenser; 3. Refer to the pressure gauge for judgment and perform system reprocessing; 4. If airflow decreases and system pressure and temperature become unbalanced, clean the evaporator or filter. Taking the 2019 BMW 740Li as an example, its front suspension is a double-wishbone independent suspension, and the rear suspension is a multi-link independent suspension. The 2019 BMW 740Li is equipped with a 2.0T turbocharged engine, with a maximum horsepower of 265PS, a maximum power of 195kW, a maximum torque of 400Nm, and is paired with an 8-speed automatic transmission.
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OAshlyn
08/11/25 10:04pm
I've been in the auto repair industry for many years and have seen numerous BMW 740s with air conditioning issues. The most common problems are refrigerant leaks or insufficient levels, resulting in weak cooling. You can check it yourself: after starting the engine, press the AC switch—if there's no humming sound from the compressor, it might be a compressor failure or an electrical circuit issue. Also, check if the cabin air filter is clogged, as excessive dirt can impair cooling performance. For high-end cars like BMWs, the complex control systems mean that faulty thermostats or sensors can also cause problems. I recommend starting with simpler checks, such as verifying if the blower fan speed is normal. When temperatures rise, a malfunctioning AC can be dangerous, increasing the risk of drowsy driving. Regular maintenance is the best strategy—cleaning the filter every quarter can prevent most issues.
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