* R-12 is no longer legal: R-12 (Freon) is a harmful substance that depletes the ozone layer. It has been banned in most countries, and it's illegal to sell or use it for new AC systems.
* Retrofit to R-134a: Your 1993 DeVille likely needs to be retrofitted to use R-134a, a more environmentally friendly refrigerant.
* Specifics matter: The exact refrigerant charge amount depends on the specific AC system in your DeVille. Factors like the size of the system, the type of compressor, and the condenser size all play a role.
What you should do:
1. Find a certified technician: Take your Cadillac to a qualified automotive AC specialist.
2. Retrofit: If your system hasn't been retrofitted already, they can do it for you. This involves replacing parts that are incompatible with R-134a and ensuring the system is correctly calibrated.
3. Correct charge: The technician will then properly charge your AC system with the correct amount of R-134a, taking into account all the factors specific to your DeVille.
Please note: Attempting to work on your AC system yourself is extremely dangerous due to the high pressure involved. Always consult a qualified professional.
