A popping noise is coming from my fan.

Aerofoil noise occurs when aerofoils are not tightened to the specified torque. Disconnect the fan from power, and then tighten the aerofoil hardware to 29 ft·lb (39.3 N·m). Note: If the hardware is stainless steel, tighten the aerofoil hardware to 10 ft·lb (13.6 N·m). If popping still occurs, verify that the aerofoils are not contacting each other. If they are, contact Customer Service.

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