How to add refrigerant to the A/C system?

Hello,

If the Freon is low on the A/C system, it can be added through the port on the low-pressure A/C hose.
If it hasn't been converted over, your 1993 Camry likely has an R12 A/C system. In which case you will first have to change it to the R134a system.
So, step one would be to see what the type of A/C system in your car is. If it has been converted over then there should be a sticker somewhere under the hood.

Take a look at this guide. It shows what to do to add refrigerant to the A/C system. Keep in mind you will need to check the pressure of the system before adding. As adding too much can damage the components.

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

Let me know of any questions.
Thank you.

Thanks for the info. I don’t believe it has ever been converted over to R134. How come I can’t just add R12 refrigerant to the existing system?

You cannot buy R12 refrigerant. It is only available to licensed businesses due to being a hazmat item.
Most auto parts stores will have conversion kits that can be installed (see picture below), which is simply a few adapters. Then the system will have to be evacuated the R12 and put in the 134a.