Onan 5500 Shut down with Code-41

[Paul T]

Anyone done self help for a Onan 5500 Fault Code 41...Generator Rotor? The book says take it to the dealer which I’ll do after rechecking all connections etc. The first symptom I was it would shut down when I turned off the A/C which I have always done to let it cool for a bit. Then later it just decided to shut down on its own after about 15 minutes throwing out the Code 41 fault code. First time I have had a problem with it. Just 240 Hr

[ccook129]

GENUINE ONAN BRUSH BLOCK ASSY #212-1303 | eBay

I would try brushes first,real easy to change.