The first did not work. It beeped constantly at the green light in the office, but even holding it in front of the freon tank valve when it was slightly ajar, he couldn't detect any freon escaping. Replacement, the second one arrived before I sent the first one back. Tested it and it works as it should. My guess is that there are quality control issues with the manufacturing or that they are damaged in some way between production, storage, shipping and receiving the device. replace and try again.
๐จ 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
Robust Robinair (RG3) Portable Refrigerant Recovery Machine, 115V, 60Hz -Efficiently Recovers Liquid and Vapor Refrigerant
9 Review
๐ UView 560000 Combustion Leak Tester: A Reliable Tool for Efficient Diagnosis
9 Review