How to Fix a Well Pump: If your well pump isn’t working, first check for power outages or tripped breakers. Next, check the pressure tank and pressure switch to ensure they’re functioning correctly. If the pressure switch is faulty, replace it. If the problem persists, verify the wiring connections and inspect the well cap and casing for leaks or damage. If the pump is still not running, it may need to be replaced or serviced by a professional.