I would recommend to read gauge first, mine read 20psi, I added the oil charge to compensate for oil loss , it went up to 30psi @1500rpm and 65 degrees on a dash thermometer then added the attic air can and the gauge went to 40psi @ 1500rpm and the dash thermometer read 45 degrees I feel the third can will over charge the system so I will wait to see if it gets warm over time as an over charge will damage the system. It’s best to do this process slowly If watching the thermometer you see the dash temp go up then you over charged The system but don’t worry you can always remove the gauge and push down on the valve to remove some refrigerant but do it very slowly and watch the temperature on the dash thermometer keeping it at 1500 RPM and the temperature will come down as you remove refrigerant from the system and get the PSA round 40 and good luck Read full review
Verified purchase: Yes | Condition: New
Works great, reasonable price. Thankyou
Verified purchase: Yes | Condition: New
Item received as shown, but the charging hose that came with it was not compatible with my pickup's AC input connection. I was not able to transfer most of the AC coolant into my truck's AC system.
Verified purchase: Yes | Condition: New
It has everything I needed to fix my slow ac leak on 2017 GMC Acadia. Only thing else I ordered was an oil checker from enviro safe. Worked awesome
Verified purchase: Yes | Condition: New
threads on the can was really bad lost most of the oil doesn’t matter how tight was still was not getting sealed 
Verified purchase: Yes | Condition: New
Current slide {CURRENT_SLIDE} of {TOTAL_SLIDES}- Best Selling in Other Air Conditioning & Heating