What is indicated by a test of the compressor oil after a burnout?

Testing the compressor oil after a burnout primarily indicates its acidity. During a burnout, the compressor can overheat, leading to the breakdown of oil and the formation of acidic compounds. These acids can corrode metal components within the compressor and the entire HVAC system, potentially leading to further damage if not addressed.

Monitoring the acidity of the oil is crucial because it provides insight into the condition of the oil and the extent of degradation due to the burnout. High acidity levels are a sign of oil breakdown and can indicate the need for system cleaning and components replacement to prevent ongoing damage.

While smoke and viscosity may also be factors to consider following a burnout, they do not provide the same level of specific information regarding the chemical changes that have occurred in the oil. Alkalinity, although it relates to acidity, is not the primary measurement taken in this context. Therefore, acidity is the key indicator that helps in assessing the aftermath of a compressor burnout.