20 Most Recent Little Giant Submersible Sump Pump 2760 Gph, 3/10 Hp, 1 1/2in., Model# 506158 Questions & Answers

Switch to advance Digital Controller, like I did and your problems is behind ! Check this out: www.SAMConrollers.com

These units are normally factory sealed. You can buy a secondary float switch from a hardware store which intercepts the pumps power at the wall outlet and takes over the float switch duty. compare the costs as it may be more benificail to replace the pump

Hi vincent w wa...

Time to buy a new pump...there is no repair parts available for that sump pump sorry.
You could try replacing the faulty switch with a floating ball switch something like on the webpage below if you have room..just be sure to make a water proof seal on the wire connections.
Please take time to rate me

Float Switch;
http://www.grainger.com/Grainger/GENERAL-ELECTRIC-Float-Switch-4ZZF3?Pid=search

For this pump to turn on, it must be under 7" to 10" of water. The water gets into the switch housing (which has an opening in it) and water pressure pushes on the rubber diaphragm (much the same as you did when you removed the cover). Once the pump turns on and lowers the water level to between 1" and 4", the pressure of the water will not be enough to keep the switch closed and the pump stops automatically.
Gary

I would, if its kicking out the gfi that means the integrity of the electrical components of the pump are compromised.Either a cord leak or seal leak, buy a new one, cheaper than fixing it

replace the pump, sounds like it is over heating and shuting down so it doesnt burn out.

Honestly I don't think so. If I remember the pump housing is ultrasonically sealed to prevent water entry and is not designed to permit opening for repair. But there is another way. If you can't replace the cord, cut off the bad section, leaving as much as you can that's still good; and wire it together with another waterproof extension cord through a water proof fountain repair cable kit. (Don't forget to use a water-resistant cable assembly or water will eventually migrate into the insulation, shorting the cable.) Here's one example. http://community.homedepot.com/howto/DiscussionDetail/Repair-Fountain-Cable-9065000000007sD By all means, this pond circuit MUST be protected by a GFCI. Water, electricity and a human body don't mix well.

impeller cavitating [air trapped] impeller damage --bearings --debris

Call the manufacturer.

No, The discharge check valve may be leaking and letting water drain back into tank. It is time buy a new one about $45.00

Hello Rob Gallau, Yes it shows thermal protection... but I have found the INSTRUCTIONS for your specific pump... http://littlegiant.com/media/153704/993949_2e-series_manual.pdf They only indicate how to clean the impeller... and SPECIFICALLY INSTRUCT the pump must be returned to LITTLE GIANT for any other repairs. Sorry

use a meter to test the float switch

Unplug and try freeing up the impeller by hand. You may have to remove bottom of pump to gain access.

nothing with those numbers, https://www.plumbingsupply.com/little-giant-pump-index.html

The vent pipe must be vented to an open air pipe.

new pump

Not sure about that, but you could have the tank welded, probably for much lees then replacing it.

Check for power at the outlet. Could also be the GFCI breaker tripped.

Its supposed to be controlled entirely by the float switch in the pit, etc. Its not uncommon for the pump to work or stay on even if the water level drops because the float can get hung up on the pipes, side walls, debris in the pit etc. You need to eliminate all those issues. Other issue is the float switch my be bad, hanging up or need resetting to the proper height etc. If its still a problem try replacing it with a water sensor switch instead.

Do you have a check valve in the pipe going out to wherever you are pumping,? If not the water from a long run will just keep recycling in the basement and the pump will run continuously. Is your pump running all the time? If so of course you will wear it out. Add a check valve if you dont have one. you can buy one at any hardware store. Just tell them the size of your discharge line.