There was a problem with entering the system. Make sure you tighten it fully with pliers and somewhere wearing thick gloves to protect your hands from frostbite. It didn't work the 1st time, the company sent another 1. They stand behind their product. I can't say it works because I don't know how big my leak was. Make sure you buy the desiccant injection first, then put the UV detection seal.
π UView 560000 Combustion Leak Tester: A Reliable Tool for Efficient Diagnosis
9 Review
π¨ Robinair (15115) VacuMaster Single Stage Vacuum Pump - For Efficient Single-Stage Vacuuming, Delivers 1.5 CFM
9 Review
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