Derek ColeGM, Simmons One Hour Heating & Air · AI HVAC Answers

Why Does My Air Conditioner Make a Loud Noise?

29 Jan 2025 · 0 min

Watch on YouTube

0:26

This short explanatory clip describes why an air-source heat pump/air-conditioner makes a loud noise during its defrost cycle: the unit briefly reverses refrigerant flow (switches to AC mode) and activates electric heat strips so the home remains warm, and the reverse gas/refrigerant flow produces the loud sound.

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