I chose this for a project with one of my cars that had a coolant leak. I wanted to find the leak as it has been bothering me for over a year. Despite using sealant and leak preventive I could not find the leak (even with UV light + refrigerant labeled). It's time for something special. I was very lucky to be able to test this with the Vine program because it solved my problem. Literally 25 minutes and everything was decided. I can understand why this tool is literally invaluable for anyone who works with AC stuff (or even home appliances) every day. After fixing my car so easily; I checked my grandma's fridge which has had two serviced in the last 18 months and we found a leak! Easy fix and no more headaches (hopefully). Overall I am very happy with this tool because it did what I needed. Even as a person who isn't an AC expert at all; I was able to easily solve the problem on 2 different systems in 2 different locations.
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