Pump emits a high‑pitched squeal or screech when running

Safety first: Turn off the pump immediately to prevent further damage.

• Check for prime: Verify that the pump strainer housing is full of water. Re‑prime if necessary.
• Inspect for leaks: Look for water leaking from the seal area between motor and pump housing. Continuous leakage indicates seal failure.
• Assess noise source: If the noise is localized at the seal area, the mechanical seal is likely damaged. If at the motor body, bearings may be failing.
• Replace components: Mechanical seal and bearing replacement require disassembly. Use a Lowara‑approved seal kit and follow the service manual.
• When to call a pro: Seal and bearing work is best handled by an experienced technician to avoid misassembly and leaks.