Bryant air conditioner outdoor unit vibrates excessively during operation; unit may shake pad or make low-frequency rumble.

Safety first: Turn off power at the disconnect before touching the unit.

Steps:

• 1. Check pad level: Verify that the concrete or plastic pad under the Bryant condenser is level and stable. Minor shimming can sometimes reduce vibration.
• 2. Inspect fan blade: With power off, spin the fan blade and check for wobble or bent blades. Replace if damaged.
• 3. Compressor mounts: Look at the rubber grommets under the compressor. If missing or deteriorated, have them replaced by a technician.
• 4. Add isolation pads: Rubber isolation pads under the condenser feet can reduce transmitted vibration.