Cars & Vehicles Auto Parts & Maintenance & Repairs

How to Put R134a Into a Vehicle

    • 1). Thread the service hose onto the top of the bottle of R134a and tighten the valve to puncture the top of the bottle. Open the valve to force air out of the service hose and quickly close the valve to prevent R134a from escaping the bottle.

    • 2). Remove the cap from the low side valve. It is the smaller of the two caps located between the accumulator and compressor.

    • 3). Connect the other end of the service hose to the low side valve.

    • 4). Start the vehicle and turn the air conditioner on high.

    • 5). Open the valve on the R134a bottle. The vehicle will suck the refrigerant out of the bottle.

    • 6). Watch the pressure gauge on the service hose. Turn the valve off when the gauge reaches between 25psi to 40psi.

    • 7). Remove the service hose from the low side valve and place the cap on the valve.

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