Onan generator making strange noises when off
I have a 2002 HR Endeavor with a 7500 Onan Diesel generator. Twice I have left on a trip and the generator would not start even though I never had a problem when starting it previously. It was as if it was working and then one day, nothing. I had the starter replaced both times. After the second burn out, but before replacement, I was messing with the controls on the Norco fridge and the generator started making noises. The lights were flickering. After a bit, the 12v breaker in the battery compartment popped. The starter had gotten hot enough to burn the label off. I thought it was the fridge trying to start the generator. Willl it do that in AC mode if no AC? Right now, I am connected to shore power. The generator will start, but is off. Periodically, I will hear a noise coming from gen and lights will flicker. The first couple times, I hit start on dash. Generator started, flickering stopped. I shut down gen. No flickering. A little time passes, repeat. After a few times, I tried pressing down on switch which normally shuts it down when running. That will stop the noise and lights flickering. I have tried changing modes on fridge to see if that would make a difference. It did not. I will probably have to turn off the house 12v to keep another starter from getting burned out. Any ideas?