Nexus 5 - How to downgrade from Android 5.0 Lollipop to Android 4.4.4 KitKat.
The cost to replace Freon varies by the amount needed since it is charged by the pound. The typical charge starts with an $89 service call to visit the home and inspect your AC system. From there, the cost to add Freon is $68 for the first pound and $58 for each pound thereafter.
Quick Answer. Most vehicles need 25 to 35 pounds per square inch of Freon on the low side if the vehicle is running with the air conditioner on its coldest setting and fastest fan speed. The amount of Freon a vehicle uses is measured in pounds per square inch, or psi.