Outdoor unit vibrates excessively and transmits noise into the building structure.

Safety first: Turn off power before touching the outdoor unit.

Steps:

• 1. Check mounting bolts: Tighten the bolts securing the outdoor unit to its base or wall bracket.
• 2. Install rubber pads: If the unit is mounted directly on concrete or metal, add rubber vibration isolation pads under the feet.
• 3. Inspect fan blade: Look for damage or missing pieces that could unbalance the blade; replace if necessary.

If vibration persists, a technician can check compressor mounts and fan balance more thoroughly.