Good chemical wash as evidenced by the brown crud it washed out. Get a good flush gun ( available on Walmart ) and it'll take most of the gallon until the outflush runs clear.
Enhanced Elitech ILD-300 Infrared Refrigerant Leak Detector: Advanced HVAC Halogen Tester with Selectable Gas Functionality
9 Review
πͺ Enhanced Universal R134A Valve Core Remover/Installer by Mastercool (81290)
9 Review
Robust Robinair (RG3) Portable Refrigerant Recovery Machine, 115V, 60Hz -Efficiently Recovers Liquid and Vapor Refrigerant
9 Review
π¨ Robinair (15115) VacuMaster Single Stage Vacuum Pump - For Efficient Single-Stage Vacuuming, Delivers 1.5 CFM
9 Review