Power supply: Make sure the pump is plugged in and the circuit breaker hasn’t tripped. If the breaker has tripped, reset it and see if the pump turns on.
Float switch: The float switch is responsible for turning the pump on and off. Make sure the float switch is functioning properly and moving freely.
Impeller: The impeller is what moves the water out of the sump pit. If it is clogged or obstructed, the pump won’t work properly. Clean the impeller and make sure it is free of debris.
Discharge pipe: Make sure the discharge pipe is clear of any blockages and is properly connected to the pump.
Pump operation: If the pump is running but not pumping water, it may be because the impeller is worn or the motor is burned out. In this case, you’ll need to replace the pump.