A sump pump that runs without removing water usually has a clogged intake, a jammed impeller, a failed check valve, or a blocked discharge line. The motor is working, but the water has no clear way out of the pit.
Clogged Intake or Jammed Impeller
Mud, gravel, and small debris collect at the bottom of the pit. They can block the screen where water enters or get stuck in the impeller, which is the part that pushes water out. The pump hums or runs, but very little water moves.
Check Valve Problems
The check valve sits on the discharge pipe and keeps pumped water from falling back down. If it fails, or was put in backward, the same water drains back into the pit each time the pump stops. The pump keeps cycling without making progress.
Blocked or Frozen Discharge Line
The discharge pipe carries water outside. If it is crushed, clogged with leaves, or frozen in winter, water cannot leave. Check that the outdoor end is not buried under snow, soil, or debris. Water that drains right next to the foundation can also soak back in and return to the pit.
Air Lock or a Worn-Out Pump
Air can get trapped inside the pump housing and stop it from moving water. Many pumps have a small weep hole to prevent this, and that hole can clog. Older or undersized pumps may also run nonstop and still fall behind during heavy rain.
A pump that runs constantly without moving water can overheat and fail. If the water keeps rising, stay clear of the pit and any cords, and get help.
A plumber can check the valve, intake, and discharge line and fix the cause. To ask about your pump, call JPR Plumbing at (833) 603-1840. A pump that fails often may point to larger drainage issues worth checking.