Hot gas bypass is used to _____ an evaporator coil.

Prepare for the HVAC D-2 License Exam. Study with flashcards and multiple-choice questions. Each question comes with hints and explanations. Get ready for your HVAC certification!

Multiple Choice

Hot gas bypass is used to _____ an evaporator coil.

Explanation:
Hot gas bypass is used to defrost an evaporator coil. By diverting hot refrigerant gas from the compressor discharge into the evaporator, the coil’s temperature rises above freezing, melting frost or ice buildup. This restores heat transfer efficiency without stopping the system. Venting, cooling, or preheating aren’t the operation here—the purpose is to warm and thaw the frost.

Hot gas bypass is used to defrost an evaporator coil. By diverting hot refrigerant gas from the compressor discharge into the evaporator, the coil’s temperature rises above freezing, melting frost or ice buildup. This restores heat transfer efficiency without stopping the system. Venting, cooling, or preheating aren’t the operation here—the purpose is to warm and thaw the frost.

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