What condition increases the risk of overheating the compressor's motor windings in a heat pump system?

💡 Explanation

A restricted suction line, typically due to a blockage, causes the compressor to work harder and run hotter because the refrigerant returning is lower in volume thereby offering reduced cooling to the motor windings. Therefore motor overheating occurs rather than defrost inefficiency, valve malfunction, or flow fluctuations from other components.

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