You might also notice a visible oil leak around the compressor pulley or under the vehicle, often appearing as a slick, dyed residue. Modern vehicles have transitioned from older R-12 refrigerant, which used mineral oil, to newer, environmentally friendly options like R-134a and R-1234yf.
Understanding POE Oil Moisture Sensitivity and Its Impact on Air Condition Compressor Oil
These newer refrigerants are incompatible with mineral oil and require specialized synthetic oils, such as Polyolester (POE) or Alkylbenzene (AB) oil. Mineral Oil: Historically used with R-12 systems; rarely used in modern vehicles.
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. Additionally, avoiding "flush kits" unless absolutely necessary is recommended, as aggressive flushing solutions can potentially damage delicate components and leave behind debris that harms the new oil and refrigerant.
Understanding POE Oil Moisture Sensitivity and Its Impact on Air Condition Compressor Oil
Conversely, if the viscosity is too high, the oil may not circulate properly, resulting in poor lubrication and increased energy consumption as the compressor has to work harder to turn over. Furthermore, a sudden loss of cooling performance or the system cycling on and off erratically can signal that the oil is degraded or that internal components are wearing due to friction.
More About Air condition compressor oil
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