Pump runs but there is a strong burning smell from the motor area, sometimes with light smoke.

Safety first: Turn off power immediately and do not attempt to restart the pump. Smoke indicates a serious fault.

• Allow to cool: Let the motor cool completely before inspecting to avoid burns.
• Inspect for mechanical issues: Check that the impeller and shaft can rotate freely by hand. If seized, do not attempt further operation.
• Check for visible damage: Look for melted insulation, discolored end bells, or burnt smell from the windings.
• Do not reuse: A motor that has smoked or smells strongly burnt should be replaced; internal insulation is compromised.

Replace the motor assembly and investigate any system issues (blockages, incorrect voltage) that may have caused the overload.