Adding freon to your Buick Roadmaster to replace lost freon caused by small leaks is a popular do-it-yourself project. Air conditioning repairs can be expensive to have done by an auto shop. Air conditioning repair tools and equipment are readily available at your favorite auto parts store, along with the R-134A refrigerant you will need to restore the air conditioning cooling capacity on your Roadmaster. You can complete this project in less than an hour if you are an average do-it-yourself mechanic.
Things You'll Need
- A/C gauge set
- Can tap
- R-134A refrigerant
Attach the blue and red hoses on the air conditioning gauge set to the Buick's service ports located on the air conditioning lines in the engine compartment. On the Roadmaster, attach the blue hose to the low-pressure service port located on the A/C accumulator between the power steering fluid reservoir and the firewall. Attach the red hose to the high-pressure service port located on the A/C line near the passenger side of the radiator.
Screw the yellow hose from the gauge set to the can tap. Screw a can of R-134A refrigerant to the can tap. Check to be sure both valves located on the gauge set are closed. Open the can of refrigerant by twisting the thumbscrew on the can tap counterclockwise until it stops. Unscrew the thumbscrew.
Start the engine and turn the air conditioner to its maximum cooling setting and medium blower speed. Open the blue valve on the A/C gauge set and allow the can of refrigerant to empty into the A/C system.
Close the blue valve and remove the empty can of refrigerant from the can tap. Allow the engine to run for a few minutes and observe the pressures indicated on the gauges. Add an additional can of refrigerant if the low-pressure gauge reads below 30 psi and the high-pressure gauge reads below 300 psi.
Tips & Warnings
- Wear safety glasses and work gloves when working around a running engine to prevent serious injuries.
How to Check the Freon in AC Units
R-134a is the refrigerant found in most automotive AC units today. Procedures for checking the refrigerant level do not vary much from...
How to Replace the Condenser in a Buick
Much like the radiator, the air-conditioning condenser on your Buick transfers heat from the circulating refrigerant in the system into the atmosphere....
How to Put Freon in an RV Air Conditioner
An air conditioner in a RV uses refrigerant to chill air passing over an evaporator coil. RV Air conditioning systems with low...
How to Put Freon in a 1994 Ford Explorer
After many years, the cooling system in your Ford Explorer will begin to blow out warm air. If this happens, it is...
How to Do a Distributor Replacement on a Buick Roadmaster
Replace the distributor in your Buick Roadmaster if it malfunctions or if you want to upgrade to a better distributor. You can...
How to Add Freon to a 1995 Buick Regal
Air Conditioning does not come stock on every vehicle but some would argue that depending on where you live, it's an absolute...
How to Charge the A/C on a 1992 Buick
Keeping your air conditioning system in good shape is important during the summer months, especially if you live in hot climates. When...
How to Replace the R134 in a Buick
R134 refrigerant replaced the old R12 Freon as an environmentally friendly alternative for powering automotive air conditioning systems in the late 1990s....