saved me a lot of money. Search for refrigerant 410a and you will find many videos. Look at any of them and you will see clues. This set worked for me; connected, pressure checked, 410 added, the split works like new! Without paying $140 for the service, I can now do it for $100, and now my gauge is installed at just the price of freon. $100 for 7#. must last 15 years.
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