Little giant rs-5 remote switch for submersible pumps wont work. When I attach the rs-5 to the plug motor nothing works. when I plug in the pump without the rs-5 the pump will work.

auto switch is defective? a simple easy replacement can be sourced from any pool supply co

Frank the pump goes inside the box with the foam around it.

Take it out and back, dont waste your time with a defected product. It will only cause you more work later

This pump works off of a pressure switch. You can remove the cover on the switch located on the side of the pump.You can either buy a switch repair kit, or you can open it up and take a look and see if the diaphragm is sticking. If you remove and clean the parts, you may have some success. Or, just buy the switch repair kit from your local Little Giant dealer. Good luck!

You say it's new? On some pumps they will secure the float switch when shipping. Be sure you followed directions and removed anything that may interfere with the switch.

Sound like the remote switch is bad or pump draws too much power for the remote switch

The rs-5 switch is supposed to turn the pump on at 6 inches to 10 inches of water from the bottom of the switch and shut the pump off when the water gets to 1 inch to 4 inches from the bottom of the switch. Sometimes the pump takes a while to prime itself the first time it starts up. The noise at the end of the cycle is not unusual either.
Is water coming back to the pump causing the switch to close?
However, going on & off almost immediately is not right. Is the switch installed in a specific location that it is designed to fit on the pump?
It does sound like the switch is going back on at too low a water level.
Also, make sure it is not a rs-5LL for low level. Even this should not allow the pump to go on and off.
Gary

inside the pump on the motor is a thermal cut out if the motor has over heater from running a long time the cut out pops and it may not pop back in again? its that or there is a motor fault like brushes worn out

You might have 2 problems. The GFIC might be wired wrong or the pump wirng might be compromised with moisture. The noise issue? Are you running this unit without submersing it? They will burn out if you do. To get a more accurate running sound, submerse it with a flexible pipe so you can run it in a 5 gal bucket without losing the water.
It's possible a bearing is burned out.
Ron

I found that little giant pump are oiled filled and if it gets hot it frys itself... As for submersible pumps Magnetic drive Beckett Pumps are nice. My Beckett pump has been going for 4 years now it pumps 4800ghp. the cost $269 last I looked.