HVAC technicians unable to diagnose pressure inconsistencies between identical AC units

HVAC professionals and DIY homeowners struggle to troubleshoot why two identical air conditioning units show different pressure readings and fail to stabilize when powered off, leading to wasted diagnostic time, incorrect repairs, and customer dissatisfaction. Current diagnostic approaches lack systematic frameworks for comparing identical systems side-by-side, forcing technicians to rely on trial-and-error or expensive service calls.