I think he's talking about the refrigerant/oil that you can add to the lines.
If it's working fine for you, I wouldn't mess with it, not even check it. Ya never know what can go wrong or break doing the simplest things.
If ya really wanna check it, it's easy enough to do. Ya just need an A/C pressure check device. Maybe they're sold separately, but they also come with the recharge cans. It goes on the low pressure port which has a green cap and I believe has a L on the cap. You can't put it on the high pressure port 'cuz they're different sizes to prevent that. The compressor has to be running to get the correct reading. Even with the A/C on the compressor may be cycling on and off due to conditions, so be sure it's on when reading. Follow the directions on the can. If ya over fill it, that's a problem that a pro has to correct.
Again, if it works fine, I wouldn't touch it.
Mark
Reply With Quote