Where are the common locations for slow leaks in car air conditioning systems?

[Melody]

Refrigerant leaks in car air conditioning systems typically occur at the following components: AC pipeline joints, expansion valves, compressors, and evaporator boxes. Below are detailed explanations of the causes of refrigerant leaks in car AC systems: 1. Pipeline malfunctions: When installing the connecting pipes between indoor and outdoor AC units, if the bending angle is too small, it may cause pipe cracks leading to refrigerant leakage or complete loss. During installation, appropriately increase the bending radius of pipes to prevent sharp bends. Leaking pipes should be promptly repaired by welding or replaced. 2. Leak points in the refrigeration system: During replacement of refrigeration system components, improper secondary installation may create leak points in pipelines and the refrigeration system. Apply moderately concentrated soapy water to the entire refrigeration system pipelines and welded joints for leak detection. The testing conditions require the refrigeration system to be filled with nitrogen or refrigerant. Carefully inspect areas with oil stains on pipelines to sequentially identify leak points, then perform component repairs or replacements based on actual conditions.

[LaLevi]

Slow leaks in car air conditioning systems are usually caused by connection issues, such as aging or deformed O-ring seals that allow refrigerant to gradually seep out. The condenser, located near the front grille, is often corroded by stones or road salt, leading to small holes and minor leaks. The evaporator, hidden behind the dashboard, can develop cracks in its aluminum tubes due to prolonged temperature fluctuations, resulting in refrigerant leaks. Worn compressor seals or loose Schrader valves can also cause refrigerant loss. These issues affect cooling performance—if you notice the AC isn't cooling properly while driving, it's best to have it checked. We recommend visiting a professional shop for a pressure test early on; avoid DIY fixes to prevent bigger problems.

[Adaline]

I've found that slow leaks in car air conditioning systems are mostly caused by loose or corroded pipe connections. For example, poor sealing at the AC hose joints or rusted condensers can easily lead to refrigerant dripping. My car experienced a similar issue - the airflow from the AC became increasingly weak, and during inspection, the technician said these components needed replacement. Additionally, the evaporator, hidden inside, may develop leaks due to years of vibration. I recommend car owners pay attention to connection cleanliness during regular maintenance to prevent moisture and dust from accelerating damage, saving both money and hassle.

[ElliotLynn]

Slow refrigerant leaks in air conditioning systems are typically caused by damaged seal components at connections or aging condensers, allowing refrigerant to gradually seep out. Compressor issues, especially loose or corroded valves, can also be responsible. After learning this, I've adopted regular inspection of connection points to ensure piping remains secure, which helps extend AC system lifespan. The proper approach is to have a professional technician conduct pressure testing for leak localization - don't wait until the AC completely fails.

[HarperDella]

Based on experience, slow leaks in car air conditioning systems commonly occur at the evaporator or pipe connections. Prolonged high-temperature operation can easily cause corrosion and perforation in aluminum components. O-rings and condensers are also frequent culprits, with minor cracks leading to refrigerant loss. When I notice reduced cooling performance while driving, I know it's time for inspection—don't ignore these potential issues that could affect driving comfort. Professional diagnostic tools are recommended for detection. After replacing aged components, the air conditioning system typically returns to normal operation.