Spa makes loud banging or vibration noises when pumps run; cabinet panels may rattle.

Safety first: Turn off power before tightening or moving components.

• Check pump mounts: Verify that jet pumps and circulation pump are securely bolted to their mounting bases with rubber isolation pads intact.
• Isolate plumbing: Ensure PVC plumbing is not rigidly pressing against the cabinet; add foam or padding where needed.
• Tighten panels: Secure any loose cabinet screws or clips.

If noise persists and seems internal to the motor, the pump may need replacement.