Which outcome can result from failing to purge air and noncondensables before charging?

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Purging air and noncondensables before charging is essential because those gases don’t condense and will occupy space in the refrigerant circuit. Their presence raises condenser head pressure, reduces heat transfer, and lowers cooling capacity, which means the system has to work harder and consumes more energy. Moisture in the mix can react with refrigerant and oil to form acids, cause corrosion, and even freeze in metering devices, leading to blockages. All of this drives efficiency down and increases the risk of compressor damage due to overheating, improper lubrication, and excessive pressures. So, skipping the purge can result in reduced efficiency and potential compressor damage or moisture-related issues.