Pump runs but makes a high-pitched whine that changes with speed.

Safety first: Turn off power before touching the pump or base.

• Isolate vibration: Install rubber isolation pads under the pump base to reduce resonance.
• Check mounting bolts: Tighten all motor and pump mounting hardware.
• Adjust speed: Slightly change programmed speeds to move away from resonant frequencies that cause whine.
• Monitor for change: If the noise suddenly worsens or is accompanied by errors, have the AquaFlo drive and motor inspected.