A/C Service Tips and Precautions
Compressed air mixed with the HFO-1234yf (R-1234yf) forms a combustible vapor.
The vapor can burn or explode causing serious injury.
Never use compressed air to pressure test HFO-1234yf (R-1234yf) service equipment or vehicle air conditioning systems.
Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.
Be careful when connecting service equipment.
Do not breathe refrigerant or vapor.
The air conditioning system uses HFO-1234yf (R-1234yf) refrigerant and polyolester (POE)
Use only service equipment that is U.L.-listed and is certified to meet the requirements of SAE J639 to remove R-1234yf from the air
If accidental system discharge occurs, ventilate the work area before resuming service.
R-1234yf service equipment or vehicle air conditioning systems should not be pressure tested or leak tested with compressed air.
dditional health and safety information may be obtained from the refrigerant and lubricant manufacturers
The following label is found under the hood.
The following illustration is an example. The value and the oil type of the actual vehicle may vary depending on the model.
Symbol Symbol name
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