How to Add Freon to a Buick Roadmaster

If you own a Buick Roadmaster its important to add Freon to your vehicle to keep your air conditioner. Performing this simple-to-do project can save you money and time that you would have to spend at an auto repair shop. Completing this project takes less than an hour, even if your not a highly trained mechanic.

What You'll Need:

• Can tap


• A/C gauge set


• R-134A refrigerant

1. Take the blue and red hose lines found on the air conditioner gauge in hand to attach. You'll find these on the air conditioner lines inside of the engine compartment. For the Buick Roadmaster, you can attach the blue hose line to the low-pressure service port that can be found on the A/C accumulator found between the power steering fluid reservoir and the firewall. You'll need to attach the red hose line to the high-pressure service port that can be found on the A/C line that is nearest the passenger side of the radiator.


2. Begin screwing the yellow hose line that is running from the gauge set onto the can tap. Then, screw a can of R-134A refrigerant onto the can tap. You'll want to ensure that both of the valves on the gauge set are closed. Twist the thumbscrew on the can tap counterclockwise until it stops in order to open the can of refrigerant. Once completed, completely unscrew the thumbscrew.


3. Turn on the engine of the vehicle and the air conditioner to the coldest temperature setting with the fan blowing at medium speed. Open the blue valve found on the A/C gauge set and let the can of refrigerant completely empty into the A/C system.


4. Close off the blue valve before removing the empty can of refrigerant. You'll want to allow a few minutes in order for the engine to run and observe the pressure as it is indicated on the gauge. If necessary, add an additional can of refrigerant if the gauge is reading below 30 psi or the high-pressure gauge is reading below 300 psi.