Check inlet for leaks.
The suction lift could be too high for the pump.
The pipes could be too small on the inlet.
Low voltage/voltage on the wrong setting.
Water level below sand point.
Clogged or restricted pipes.
The impeller could be damaged.
The pump inlet pipe has no water.
For more information, review the troubleshooting section of the owner’s manual.
Make sure your pump is located close to the water source.
NOTE: Boxes will make it overheat.
If it’s not the environment, then it could be the thermal overload system.
Ensure proper voltage is getting sent.
Check wire gauge ensure all connections are proper.
Check if there a big difference on pressure due to cycling and if you hear the chattering during on/off moments.
Ensure the pressure tank is within 5 ft of the pump.
Ensure you are using a 1-inch pipe going from the pump to the pressure tank.
Make sure the pump is on the correct voltage.
Verify there is not too much pressure in the tank.
Ensure the pressure tank is still functional.
Verify there is a check/foot valve. If you do have one, make sure it is not leaking.
Check that there are minimal fittings between the pump and the check valve. Each fitting adds distance between the pump and tank.
Verify there is no check valve between the pressure tank and the pump.
Ensure the pressure switch is still functional and there are no blockages.
There’s a reason we’ve been the go-to pump for HVAC, Plumbing, Pool, and Hydroponics professionals for generations: experience. For 80 years, Little Giant® products have stood the test of time, pumping a steady flow of proven reliability in the most demanding applications.