Re: A/C Refrigerant Pressure Specs - Saab NG9-5 Bulletin Board - Saabnet.com
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Re: A/C Refrigerant Pressure Specs
Posted by Stephen Goldberger [Email] (more from Stephen Goldberger) on Tue, 10 Jul 2018 14:57:25
In Reply to: A/C Refrigerant Pressure Specs, Andy In Friendswood, Tue, 10 Jul 2018 13:03:03
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All the other modern Saabs use a constant pressure compressor, and I would guess the NG 9-5 uses it also. It's a variable stroke piston compressor with a mechanical feedback to ensure that refrigerant pressures remain constant. The proper way to recharge is to evacuate the system and insert the specified weight of refrigerant.
Another way is if you *know* there's a slow leak, you add charge until you get cold air, mindful that too little refrigerant is far better than too much. I don't recommend it (but have done it). But measuring pressure levels won't get you anywhere with a variable stroke compressor.
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