Loud grinding, squealing, or rattling noise from the equipment bay when jets are on.

Safety first: Turn off power at the breaker before touching the pump or motor.

• 1. Check water level: Ensure the spa is filled to the correct level to prevent air from entering the pump.
• 2. Verify valves are open: Confirm all slice valves around the noisy pump are fully open.
• 3. Inspect for debris: Remove the pump suction union and check for stones, leaves, or other debris in the impeller.
• 4. Check mounting: Ensure the pump is securely bolted to its base and that rubber isolation mounts are intact.
• When to call a technician: Persistent grinding or squealing usually indicates failing motor bearings; the pump motor should be rebuilt or replaced by a professional.