For those of you worried about using compressed air because of moisture. My question to you is, what do you think is in a system that has a leak and all of the refrigerant is gone? Atmospheric air and moisture! This is a tried and proven test for me over the last 25 years and it is one that everyone can do. Who has a bottle of compressed nitrogen sitting around anyway, especially when you only do a few A/C jobs a year.

Tools used
A/C Manifold Gauge Set
https://www.jbtoolsales.com/atdtools...
Vacuum Pump & Gauge Set Assortment (least expensive kit I could find that I felt was descent and it is the one I use)
https://www.jbtoolsales.com/fjc9281...
3.0 CFM Vacuum Pump (same pump that comes in the kits listed above)
https://www.jbtoolsales.com/fjc6909...
6 Gallon Air Compressor 150PSI
https://www.jbtoolsales.com/bostitch...
Spray Bottle W/Sprayer
https://www.jbtoolsales.com/meguiars...
Car Wash 64 oz
https://www.jbtoolsales.com/mothers0...
R134a Can Tap Valve
https://www.jbtoolsales.com/mastercoo...
Bayco NSR2168B LED Rechargeable Work Light 600 Lumens w/3 Magnets Lithiumion Battery
https://www.jbtoolsales.com/bayconsr...

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Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.