Question about Generac Electrical Supplies

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Generac Guardian 10K has no lights on the panel. The battery show 12V. The 15amp popup breaker won't stay closed. I examined the PCB for signs of damaged components and did not see anything unusual.

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Posted on Dec 21, 2018

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: GE Max dishwasher no lights on panel

I have the same problem and actually found a workaround by mistake you may try as a temporary solution (if that works for you):

- press and hold the lock button for a couple of seconds
(the delay timer would increase by 1 hour)
- press and hold the lock button again
- repeat until it reaches 9hrs
- repeat one more time: the control panel should be functionnal again.

Let me know if that worked for you!

Posted on Mar 22, 2008

  • 26 Answers

SOURCE: Attempted to start Generac Guardian 15 kw air

I work on these every day. Its either gonna be the rotor or stater, the voltage regulator, but most likely its a bad stepper motor which is the throttle motor, or control board. Thats all that could be causing that so its one of those. If its the rotor or stater thats bad it causes the generator to RPM up because it thinks its not producing enough power due to that. I had the same problem with the same one we just fixed and it was the slip rings on the end of the rotor so bad rotor.

Posted on Jul 09, 2009

  • 384 Answers

SOURCE: 10kw Generac Guardian not cranking, shows rpm sense loss

Sounds like Generator mode switch should be "ON".

Posted on Sep 08, 2009

THENTHEREWER
  • 131 Answers

SOURCE: New Generac Generator--Battery Goes Dead

Yes,if its working correctly,you should be getting a reading about 2.5 to 3 volts above the battery voltage rating while its in standby mode.

Posted on Jan 17, 2010

  • 1 Answer

SOURCE: Generac Guardian 15 kw overspeed fault

Did you remember to set the overspeed shutdown threshold on the control board?

Posted on Jun 07, 2010

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1 Answer

No power to unit no led lights light,no display in the led screen


You need to check the 12v battery in the unit it is what powers the lcd display and led lights on the generator.

Oct 15, 2010 | Generac Guardian 200 Amp Transfer Switch...

2 Answers

I have a 10 KW Generac Guardian Stand By withe a prwired EZ transfer swithc. Everything works except the 12 volts battery charger. What could be the problem. Only have three weeks innstalled.


Your generator is equipped with a battery trickle
charger that is active when your unit is set up for
automatic operation. The trickle charger is
designed to help extend the life of your battery by
maintaining the battery when the unit is
not running.
you will need to review which circuit bord controls this and have that board replaced or serviced some of these gen heads have this built in and it will be the rectifier in the gen it self it will be a black 1x1x3/8 inch with a mounting hole in the center and 4 lug post for the wires replace this and your issue should be solved but consult your dealer for witch unit you have as to a control board external or the built in rectifier hope this helps.

Aug 11, 2010 | Generac Guardian Series 5502 10 kW...

1 Answer

Installed a generac 10k guardian standby generator 2 months ago and all was well,self test each week went fine until this week. Seems to have lost power, screen blank and can't reset? How can I get this...


If you installed this 2 months ago, then you are still under warranty. You need to contact Generac directly before you try to fix yourself and void warranty. Not trying to offend, just being practical.

May 17, 2010 | Electrical Supplies

1 Answer

After shutting it down for summer months it will not start, only makes click noise i have a guardian generac 7000kw home standby generator it is not the limit switch


sound like a dead battery, or dirty / bad connection from battery- try jumping it with a car battery-- if that doesn't work, check battery connection, loose or corroded leads.. otherwise it is solenoid or starter or starter switch

Sep 29, 2009 | Generac Guardian 084464 - limit switch

2 Answers

Dont have 12 volts to start switch generac guardian ultra source


Have you checked the fuse? Mine keeps blowing the fuse (located on the back of the control panel) with each startup and shutdown or use of idle control.

Jun 20, 2009 | Generac Guardian Ultra Source 15,000 Watt...

1 Answer

The battery doesn't stay charged in Guardian 10K


I think that is the problem as well. Temporarily, you could just buy a tricke charger from the parts house and hook that up until your other one is changed. Rick

Apr 11, 2009 | Guardian Electrical Supplies

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