R410a Refrigerant

How to charge car R134A AC system one

R134a is the most popular refrigerant to charge the AC systems inside the car.This tutorial will teach you to charge your car ac with r134a to save some money.

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You will need to vaccum the car if the AC is discharged completely.Follow below steps to vaccum your car.

• You need an AC mainfold gauge and a vaccum pump.
• AC Mainfold gauge has three lines : blue,red and yellow.Connect yellow to vaccum pump,red to large fitting and blue to small fitting in the car.
• Make sure that Both blue and red are off.Start the vaccum.Once the vaccum is started,please crank the base near yellow line to remove any atmospheric pressure.After that open both the blue and red lines.
• Keep the vaccum running for 30 minutes or till the reading shows less than zero on both the high pressure (red) and low pressure(blue).
• Now you have removed traces of old refrigerant,oils and dirt to the last.

How to charge car ac with R134A

• Loosen the cap on ac compressor.Attach the end of adapter here(It will be coming out of r134a can).Remove the yellow line from vaccum and attach it to can.Keep the remaining setting from vaccum process mentioned above.
• Go and start the car and turn the AC to maximum.
• Close both the red and yellow lines.
• Now screw the top of r134a can.It will puncture the can and release the refrigerant.Just shake it and turn it upside down.
• Open both the high presure and low pressure lines.
• The can will start to feel cold and light,Once the refrigerant starts to enter the ac system.
• Go inside the car and feel the ac.If it is cold then your ac is charged.
• Check the pressure gauges to make sure that you filled it to perfection.Generally it is 200 psig on high side and 30 psig on low side.But the better way is to match it with the specifications provided by your manufacturer.
• Remove the can and screw the cap back on compressor.