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Old 03-09-2019, 12:09 PM   #1
3 Rivet Member
Libertyville , Illinois
Join Date: Jun 2018
Posts: 133
Onan is Dead

Hi Folks,

The genset in my 2015 GT is dead. The start button doesn't light and nothing happens when I try to start. Also tried the button on the actual generator where I can hear a slight click when the start light flickers on then off. I'm getting error code 36. Searched the forum and haven't found any help other than it's likely a fuel supply issue. Full tank of LPG, stove and furnace both work. Coach batteries fully charged and have power to the Onan. Any ideas?

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Old 03-09-2019, 12:40 PM   #2
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1969 31' Sovereign
Broken Arrow , Oklahoma
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My guess bad ground or corroded battery connection.

You may have 12V but not enough current (amps) getting to the generator starter.
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Old 03-09-2019, 01:17 PM   #3
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Libertyville , Illinois
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Thanks Garry. The terminals were a little corroded. Just started raining here so Iíll clean them up tomorrow and see what happens
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Old 03-09-2019, 02:26 PM   #4
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1983 31' Airstream310
Hillsburgh , Ontario
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Always start with the cheapest stuff and work your way up.

Check fuel stock and supply lines
Clean all electrical connections, including grounds; (make sure to disconnect batteries first before cleaning any connections on the gen set).
Check all fuses, switches, relays and circuit breakers.

Then start checking starter.

It's usually the cheap stuff........

Sidekick Tony
Per Mare, Per Terram and may all your campaigns be successful.

ďItís a recession when your neighbor loses his job; itís a depression when you lose your own.Ē "Harry S Truman"
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Old 03-09-2019, 04:57 PM   #5
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Libertyville , Illinois
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Thanks Tony. I donít recall seeing the ground wire/ connection when I was under there today. Is it easy to spot?
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Old 03-10-2019, 09:26 AM   #6
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2013 Interstate Coach
Raymond , Iowa
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On mine the '+' and '-' cables from the house batteries are outside the generator enclosure near the bottom of the front curb side. I would start by removing these cables and cleaning the connections. If that doesn't solve it you could try the other end of those cables. But the other end is inside the rig and thus less likely to get dirty (though the connection could be loose). No reason to check the fuel lines unless/until it fails to start when turning over.
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Old 03-10-2019, 11:41 AM   #7
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Libertyville , Illinois
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I guess it was more than a little corroded!
Hard to believe this happened in just one winter
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Old 03-10-2019, 11:46 AM   #8
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2011 Interstate Coach
Evansville , Indiana
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A picture is worth a thousand words. Glad you found the problem!
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Old 03-10-2019, 12:24 PM   #9
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2007 22' International CCD
Corona , California
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When you get the lug replaced, be sure to clean the terminals thoroughly with a small brass or stainless steel wire brush. Use Marine grade terminals made of tinned copper, and use adhesive-lined heat shrink on the cable and lug to seal out moisture.

When you put it all back together (ending with the negative lead), spray the connections with the red battery terminal sealant to keep moisture and acid vapor away from the terminals.
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
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