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Topic: Retrieving Onan diesel generator fault codes? (Read 1941 times) previous topic - next topic
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Retrieving Onan diesel generator fault codes?

Yahoo Message Number: 96551
Anyone know if the Onan HDKAK diesel generator fault codes are stored/retrievable? Or do you have to stand there and watch the light waiting for it to shut down. Mine is stopping after a few hours. On restart it may shut down in a few minutes, or run for another hours or so. Coolant level is good, belt is ok, oil level is good. TIA for any help.

Larry 03 Allure 30856

Re: Retrieving Onan diesel generator fault codes?

Reply #1 –
Yahoo Message Number: 96552
Have you changed the fuel filters for the generator lately?

Mikee

Re: Retrieving Onan diesel generator fault codes?

Reply #2 –
Yahoo Message Number: 96554
I had the same problem watch the code mine was overheating. There is two fan belts one is hard to see and that is the one that was broke causing the overheating.

Dave

2005 Allure 470
2005 Jeep

Re: Retrieving Onan diesel generator fault codes?

Reply #3 –
Yahoo Message Number: 96563
Yes Mikee, just the other day after it shut down the first time. Also, changed oil and blew out filler neck air vent for coolant. I think my 8 K gen has only one belt. Thanks

Larry 03 Allure 30856

Re: Retrieving Onan diesel generator fault codes?

Reply #4 –
Yahoo Message Number: 96564
There is a water temperature overheat switch which will cause this symptom if it is going bad.

Dave

2000 Allure #30444

Re: Retrieving Onan diesel generator fault codes?

Reply #5 –
Yahoo Message Number: 96565
The only to determine what the generator thinks is the problem is to count the blinking light codes and refer to the code chart.

It may be a loose belt or an air leak in the fuel system.

Mikee

Re: Retrieving Onan diesel generator fault codes?

Reply #6 –
Yahoo Message Number: 96584
Thanks to all. Discovered that blinking lights continue for five minutes after shutdown. Since I have no blinking lights, I was told by a fellow RVer that it's a fuel issue. I guess I will approach it from that angle.

Larry 03 Allure 30856

Re: Retrieving Onan diesel generator fault codes?

Reply #7 –
Yahoo Message Number: 96586
Most likely an air leak in the fuel system. Did the issue perhaps begin right after you changed the fuel filters? If not, you may consider getting a fuel can with diesel and run a hose from that to the generator and see if the issue goes away, if it does then you know you have an air leak.

Mikee

Re: Retrieving Onan diesel generator fault codes?

Reply #8 –
Yahoo Message Number: 96592
Thanks Mikee. Filter was changed after first occurrence. Today it was hard to start. Had to prime for over a minute. Had cool weather last night, which might be contributing factor to hard starting? Sounds like strong possibility of air leak though. Will check fuel line connections (etc) next.

Larry 03 Allure 30856

Re: Retrieving Onan diesel generator fault codes?

Reply #9 –
Yahoo Message Number: 96593
The rubber fuel lines tend to develop cracks and then air leaks as they get older. You may have to change the fuel lines depending on what you find.

Mikee