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Old 08-16-2016, 10:25 PM   #1
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Join Date: Jun 2015
Location: TX
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Onan breaker replacement

When I drive over a significant bump in the road while the genset is running the #2 (bottom) 30 amp breaker trips shutting down the front A/C. I can watch it shut down the moment I hit the bump. Can't have that in our Texas heat! I want to replace the weak breaker on this Onan Marquis Gold 5500 HGJAB. Has anyone experienced replacing a breaker on this unit? I've searched YouTube and the net and haven't found any instructions on how to access the breakers. Its obvious as to where they are but how do I get to them? Any help would be appreciated.
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Old 08-17-2016, 08:05 AM   #2
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I don't have a Marquis but this should be your service manual.

If you need more help go over to and the guys are very helpful.
1996 Tioga Class C
2007 Monaco Diplomat 40 PDQ
TOAD 2012 Cadillac SRX 4
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Old 08-17-2016, 10:34 AM   #3
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Make sure it's a weak breaker an not a crushed wire causing a short when hitting the bump.

2004 Clss C 31' Winnebgo
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Old 08-19-2016, 01:07 PM   #4
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Good suggestion!
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ace, onan, replace, replacement

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