Flexible handling: Modular components and multi-stage adjustment mechanisms enable easy operation during fault diagnosis and reliable leak detection in different installation positions with no extra effort. Reliable system diagnosis: Combines micro-leak detection, adjustable sensitivity, and systematic pressure assessment to guarantee consistent performance analysis for air conditioning maintenance. Compatibility and installation: Fits all common vehicle brands with simple plug-and-play installation; flexibly adaptable to various pipe configurations in AC repairs, delivering reliable performance without extensive rework on passenger cars, vans, and SUVs. Structured troubleshooting: Self-explanatory system reduces complexity with visual actionable steps—time-efficient solution for beginners and experienced technicians with directly implementable repair steps. Use scenarios: - On-site car diagnostic: Used in a workshop to quickly check an air conditioning system suspected of leaks in a passenger car, enabling fast pinpointing of leak sources with minimal setup. - Multi-configuration diagnostics: In a workshop servicing vans and SUVs, the unit adapts to different pipe layouts to ensure consistent leak detection and performance assessment. - DIY home garage check: For a straightforward at-home check of a vehicle's AC system, providing clear instructions and actionable steps for beginners.