Goodman air conditioner outdoor unit is very loud or rattling during operation

Safety first: Turn off power at the outdoor disconnect before reaching into the unit.

Steps to reduce noise:

• 1. Inspect fan area: Remove the top grille of the Goodman condenser. Check for sticks, leaves, or other debris contacting the fan blade or coil.
• 2. Check fan blade tightness: Gently try to move the fan blade on the motor shaft. If it wobbles or is loose, tighten the set screw (usually with an Allen wrench) while ensuring the blade is centered in the opening.
• 3. Tighten cabinet screws: Check all access panels and corner screws. Tighten any loose fasteners that may cause rattling.
• 4. Inspect compressor mounts: Look at the rubber mounts under the compressor. If they are deteriorated or missing, they should be replaced by a technician.

When to call a professional: If noise is coming from inside the compressor or persists after basic checks, a technician should evaluate compressor health and mounting.