Excessive vibration and noise transmitted through the wall or floor when the outdoor unit runs.

Safety first: Turn off power before working around the outdoor unit.

Steps:

• Check level: Use a spirit level to ensure the Bosch outdoor unit is level. Adjust shims or bracket as needed.
• Inspect pads: Verify that rubber vibration pads are installed under the unit feet and are not cracked. Replace if necessary.
• Tighten bolts: Tighten all mounting bolts on the base or wall bracket.

Persistent vibration: A technician may need to add additional isolation or check for internal component imbalance.