A standard residential sump pump can run continuously for several hours during an intense, heavy rainstorm, provided it is properly sized and water is flowing freely. However, if a pump runs continuously for 12 to 24 hours or longer without a break—often caused by a stuck float switch or an overwhelmed basin—the motor will rapidly overheat, wear out internal bearings, and suffer complete thermal burnout. Verification: Check that water is actively discharging outside and ensure the pump turns off once the pit empties.
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