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.