A standard residential submersible sump pump can run continuously for several hours during an intense rainstorm, provided it is properly sized and water is flowing freely through the discharge pipe. However, if a pump runs continuously for 12 to 24 hours or longer without stopping—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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