| Onan AC issue [message #180619] |
Fri, 17 August 2012 09:28  |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Senior Member |
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I'M a newbie to RVing and GMCMH and I'm an electrician, but before I start tearing things apart to troubleshoot, has anyone ever experienced this:
Start Onan, no AC (110V) turn on rooftop air conditioer (A/C) rooftop runs, now have 110VAC at outlets, turn off rooftop, lose 110VAC at outlets...recently replaced bridge rectifier due to 110VAC/ no rooftop air either... 
Thanks,
Sean
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
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| Re: [GMCnet] Onan AC issue [message #180621 is a reply to message #180619] |
Fri, 17 August 2012 09:37  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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I suspect some loose connections. Unplug the GMC and turn off the Onan. Remove the cover from the inside breaker box. Tighten all wires at the buss bars and where they connect to the breakers.
I suspect that you will find some loose ones.
These connections come loose over the years. Probably from thermal heating and cooling.
In the past others have reported A/C problems and after I suggested they check the connections their problem was solved. If anyone hasn't ever checked the wires they should do so every few years.
Emery Stora
77 Kingsley
Frederick, CO
On Aug 17, 2012, at 8:28 AM, Sean Kidd <fiatkidd@yahoo.com> wrote:
>
>
> I'M a newbie to RVing and GMCMH and I'm an electrician, but before I start tearing things apart to troubleshoot, has anyone ever experienced this:
> Start Onan, no AC (110V) turn on rooftop air conditioer (A/C) rooftop runs, now have 110VAC at outlets, turn off rooftop, lose 110VAC at outlets...recently replaced bridge rectifier due to 110VAC/ no rooftop air either... :?
>
> Thanks,
> Sean
> --
> 73 Canyonlands 26' #317
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| Re: Onan AC issue [message #180626 is a reply to message #180619] |
Fri, 17 August 2012 09:59 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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I found that a couple outlets were bad. again... looked great on the outside. but once I pulled them out, there was the problem.
for the cost, might be smart to just change out all the 110Volt outlets to be sure.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Onan AC issue [message #180632 is a reply to message #180619] |
Fri, 17 August 2012 10:27 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| SeanKidd wrote on Fri, 17 August 2012 10:28 |
I'M a newbie to RVing and GMCMH and I'm an electrician, but before I start tearing things apart to troubleshoot, has anyone ever experienced this:
Start Onan, no AC (110V) turn on rooftop air conditioer (A/C) rooftop runs, now have 110VAC at outlets, turn off rooftop, lose 110VAC at outlets...recently replaced bridge rectifier due to 110VAC/ no rooftop air either...
Thanks,
Sean
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Sean,
When You find and cure this one, you have got to come back here and tell us.... Please..
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Onan AC issue [message #180639 is a reply to message #180619] |
Fri, 17 August 2012 11:31 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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I'd go with Emerys suggestion first. This covers a shore power scenario.as well. Pop the breakers out and reseat and flip as well Wild temp swings, humidity swings and vibration not easy environment. Maybe open your 14-50 box and snug in there too for piece of mind.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Onan AC issue [message #180640 is a reply to message #180619] |
Fri, 17 August 2012 11:37 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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| SeanKidd wrote on Fri, 17 August 2012 07:28 |
I'M a newbie to RVing and GMCMH and I'm an electrician, but before I start tearing things apart to troubleshoot, has anyone ever experienced this:
Start Onan, no AC (110V) turn on rooftop air conditioer (A/C) rooftop runs, now have 110VAC at outlets, turn off rooftop, lose 110VAC at outlets...recently replaced bridge rectifier due to 110VAC/ no rooftop air either...
Thanks,
Sean
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Strange to say the least. I would first check the no load power out at the generator then power in at the breaker box ,power out at the breaker box etc.
Roy Keen
Minden,NV
76 X Glenbrook
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