Pump runs but there is a noticeable electrical buzzing or humming from the control panel area.

Safety First: Unplug the pump before touching the control housing.

• Check mounting: Ensure the control housing is firmly attached and not vibrating against the pump body.
• Verify power: Use a dedicated outlet to ensure stable voltage.
• Monitor operation: If the noise is minor and the pump operates normally, it may be harmless. If noise increases or is accompanied by erratic behavior, the control PCB should be inspected or replaced.