The answer to 'how to fix sump pump' is to first check the power supply, inspect the float switch, and clean the pump. If the sump pump is not functioning properly, you'll need to troubleshoot and repair or replace it. This is an important maintenance task to prevent water damage in your home.
Start by checking that the sump pump is plugged in and receiving power. Next, inspect the float switch to ensure it's moving freely and triggering the pump to turn on when the water level rises. Clean the pump inlet and impeller to remove any debris that could be preventing proper operation. If the pump still doesn't work after these basic checks, you may need to replace the sump pump or call a professional plumber for further diagnosis and repair.