When performing an AC recharge or repair, it is considered best practice to replace the accumulator or receiver-drier and to evacuate the system thoroughly to remove moisture and old oil residues. If the viscosity is too low, the oil will not provide adequate lubrication, leading to metal-on-metal contact.
Understanding How Oil Mix Causes AC Compressor Noise
Mineral Oil: Historically used with R-12 systems; rarely used in modern vehicles. It also plays a vital role in cooling the compressor by absorbing and carrying away friction heat, and by mixing with the refrigerant to facilitate heat transfer in the evaporator and condenser.
Types of Refrigerant and Corresponding Oils The type of refrigerant used in the air conditioning system dictates the specific class of oil required. Using the wrong oil blend can cause the refrigerant and oil to separate, leading to a breakdown in lubrication and potential system contamination.
Understanding How Oil Mix Causes AC Compressor Noise
Maintenance Best Practices Proper maintenance of the air conditioning system begins with selecting the correct oil specified by the vehicle manufacturer. These newer refrigerants are incompatible with mineral oil and require specialized synthetic oils, such as Polyolester (POE) or Alkylbenzene (AB) oil.
More About Air condition compressor oil
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