charge a/c system

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Use plain refrigerant, nothing with additives, o-ring conditioner, sealants, etc. If there is a leak, fix the leak. Use a manifold gage set when charging the system. When charging a system that has been empty, pull a vacuum for at least 45 minutes and charge into the vacuum.

One could write a book on the do's and don'ts - many have. Is there a specific A/C issue you're working on?

'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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2001 eldorado, just got the " low refrigerant / a/c compressor off " message! I haven't been using the a/c because a noise in the blower motor when on High. But I wanna try and charge it to see what happens? Where do I start!

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