Diagnostic Equipment

State of the art Diagnostic Equipment

At CMS AutoAir we identify the refrigerant gas in your vehicle’s air conditioning system as to its purity for the correct system operation, usually 134a. The refrigerant analyser Identifies illegal replacements & blends including propane & butane, While quickly & automatically determining if the purity of R134a refrigerant is atindustry acceptable levels.When purity levels drop below 98% this has an effect on the cooling capacity & operation of the air conditioners components. Air in the system can lead to premature compressor failure & other costly parts. By knowing its Pure 134a in the system, your air conditioning system will operate as it was designed toby the manufacturer.

Side effects of excess air in an A/C system can lead to false readings in electronic low charge indicators in some vehicles; rapid clutch cycling and potential clutch failures; and noisy compressor operation.

Refrigerant Gas Identifier

Mixed refrigerants can result in elevated system operating pressures, and this includes CFC-12 mixed with HFC-134a. A mixture of these two refrigerants will raise operating pressures to a point higher than either would ever reach by itself in a “normally” operating system.


  • This field is for validation purposes and should be left unchanged.

How high the pressure goes is determined by the mixture ratio between the two refrigerants. The raising of system operating pressures above normal can result in poor A/C performance. With some reclaimed refrigerants it is also essential to know the makeup of that refrigerant, whether it contains contaminants like, Air, Nitrogen, Hydro-carbons etc, possibly from a previous regas.

The use of flammable refrigerants in an automotive air conditioning system is usually without the consent of the system manufacturer, which not only compromises the warranties but can also raise safety concerns to the vehicle occupants should a leak appear. (additional info at this Workcover Link)

It is for this reason CMS AutoAir want to know what’s in your car? We don’t use flammable refrigerants in your car, only 134a the approved & manufacturers designed refrigerant is used in your car. A printed diagnostic makeup of the refrigerant in your system can be produced at the completion of the repair confirming the refrigerants identity so you can be confident in what’s in your air conditioning system and achieving the cooling performance it was designed for.