A 1990 Cadillac Deville air conditioner should hold 46 oz. R12 Freon. This should be verified through the owners vehicle manual.
Compressor not running?Heater control in heat position?
How do I put freon in a 2002 Cadillac deville
A Toyota Echo air conditioner is designed to cool the vehicle. If the air conditioner stops working, it could be low on freon or the motor could have seized.
Answering "Where do you add freon to your air conditioner in your ford ranger?"
There are quite a few reasons why an air conditioner could be running but not cooling. One should first check the Freon lines and ensure that there is an adequate amount of Freon available.
It could be low or freon, or maybe dirt coils.
Could be low on freon,
Check the temperature control cable
you use freon to cool your car and make the air conditioner work