To fix a sump pump that runs continuously without stopping, follow a safe diagnostic sequence. Step 1: Inspect the sump pit to check if the float switch is physically wedged against the basin wall or tangled. Step 2: Manually lift and drop the float to free the internal switch contacts. Step 3: Check the check valve to ensure water is not flowing back into the pit. Step 4: If the float is free but the motor keeps running, unplug the power cord immediately to prevent motor burnout. Verification: Confirm that the motor halts completely once unplugged or once the float switch drops to the bottom.
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