Red Seal Refrigeration And Air Conditioning Mechanic (313A)

What is the purpose of a crankcase heater on a compressor?

To warm the refrigerant for faster startup To keep the compressor oil warm during off cycles, preventing refrigerant migration and liquid slugging on startup To defrost the outdoor coil To preheat the supply air

Correct Answer:

To keep the compressor oil warm during off cycles, preventing refrigerant migration and liquid slugging on startup

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