Refrigerant Gas Analysis, Performing

WARNING: This page is about a different car, the 2023 Volkswagen Atlas. However, it is still accessible from the selected car via links, so may be relevant.

The gas analysis is used to meet the specified purity of the refrigerant, to detect contaminated refrigerants and to protect the A/C Service Station.
Without a gas analysis no refrigerant should be removed from the A/C Service Station.
Use of the wrong refrigerant will void the operating permit for the vehicle.

-- Connect the Gas Analyzer or A/C Service Station to the refrigerant circuit according to the owner's manual and start up. Refer to Owner's Manual.

-- Perform the gas analysis according to the owner's manual. Refer to Owner's Manual.

TIP

A minimum refrigerant circuit pressure is necessary (for example 2.5 bar at an ambient temperature of 20 °C (68 °F)) for performing the gas analysis.
If no sufficient pressure can be built up due to very little refrigerant left in the circuit, then it might not be possible anymore to perform a gas analysis, depending on the version of the A/C Service Station or the Gas Analyzer. Refer to Owner's Manual.

The following values apply for a gas analysis of clean refrigerant R1234yf:

The extracted refrigerant gas is made up of a minimum of 95 % refrigerant R1234yf.
The portion of foreign gases (oxygen, nitrogen, steam, and other refrigerants) is smaller than 5 %.

Refrigerant does match the specifications.

-- Perform the necessary procedures using the A/C Service Station. Refer to WORKING WITH A/C SERVICE STATION .

Refrigerant does not match the specifications:

-- Return the contaminated refrigerant to, for example, the gas supplier for analysis, processing or disposal. Refer to CONTAMINATED REFRIGERANT, FILLING IN RECYCLING CYLINDER FOR ANALYSIS, PROCESSING, OR DISPOSAL .

If the gas analysis determines contaminated refrigerant or refrigerant of unknown composition, then the client must be made aware of this situation before continuing the procedures.

If the wrong refrigerant has been used in the refrigerant circuit, then a special evaluation must be performed and appropriate measures must be taken.