No, a standard residential sump pump should never run constantly. While continuous operation for a few hours during an intense, heavy rainstorm or severe spring snowmelt is normal, a pump running nonstop for days indicates a mechanical malfunction. Continuous running is typically caused by a stuck float switch, an overwhelmed basin capacity, a faulty check valve allowing water to recycle back into the pit, or a failing pump. Verification: Check the sump pit basin to see if water is actually being evacuated or if the pump is trapped cycling on a stuck switch.
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