Pump is running but is extremely noisy, with a high-pitched whine or grinding sound.

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

• 1. Isolate the noise source: Place a screwdriver or mechanic’s stethoscope against the motor housing and your ear on the handle (do not touch live parts). Loud, rough sounds localized at the motor indicate bearing issues.
• 2. Check for leaks at shaft seal: Look under the pump where the motor meets the pump housing. Continuous dripping or salt deposits suggest a failed shaft seal that may have damaged the bearings.
• 3. Short-term mitigation: There is no reliable field fix for worn bearings; running the pump in this condition risks complete failure. Reduce runtime and speed (on VS models) only as a temporary measure.
• 4. Plan for replacement: Replace the motor (and shaft seal kit) or the complete SuperFlo pump assembly. Bearing replacement requires motor disassembly and press tools and is typically done by a motor shop.