Community Forums

triplewide · 06-16-2018, 05:16 PM

Quote:

Originally Posted by manderson2228

I did get the 15k rooftop units. I am not disagreeing with you, but when I sit stationary I run the genny and run MORE things and nothing trips. We have tried a new breaker too, as well as flipping the loads to other breaker to isolate the leg. This is a tough one!!

Disagreeing with me is Ok. I have been known to post some pretty stupid things from time to time.

manderson2228 · 07-17-2018, 10:25 PM

First off thanks to everyone for the help it was much appreciated and I learned a few things along the way! It would appear that we have it finally resolved.Turns out the issue ended up being heat related. Too much heat overall was causing the breaker to trip, living down here in GA it gets pretty hot in the summer months after continuing to monitor data points turns out it was only trigger during the time it was really hot say over 90. Coachmen was of no help predictably and finally my dealer replaced the 30a and 20a breaker with 50a breakers and it's not blown since. The actual amperage on the breaker when it's blowing is like 26a with everything running I normally run so it's still below the 30a the heat was causing it to pop...

triplewide · 07-18-2018, 01:27 AM

Life is good!

Thanks for posting

navychaps · 07-18-2018, 05:46 AM

Had an Onan mechanic tell me that the air cooled generators we're of very poor design as he was replacing the power head on mine that ate itself in 100 degree weather. I now never run the Genny in the heat while sitting still for very long. Wish mine was water cooled. My sister has the same genset in her MH and is having heat issues also.

manderson2228 · 07-18-2018, 07:44 AM

Quote:

Originally Posted by navychaps

Had an Onan mechanic tell me that the air cooled generators we're of very poor design as he was replacing the power head on mine that ate itself in 100 degree weather. I now never run the Genny in the heat while sitting still for very long. Wish mine was water cooled. My sister has the same genset in her MH and is having heat issues also.

For my money the entire purpose of the generator is to run the AC in the hot as heck southern summers

so that seems to defeat the purpose, is there some sort of aftermarket upgrade to improve the issue? Or should I just budget to expect to replace the power head on mine too at some point?

navychaps · 07-18-2018, 12:43 PM

Quote:

Originally Posted by manderson2228

For my money the entire purpose of the generator is to run the AC in the hot as heck southern summers

so that seems to defeat the purpose, is there some sort of aftermarket upgrade to improve the issue? Or should I just budget to expect to replace the power head on mine too at some point?

So far, mine is still going, I'm paranoid now when it comes to the genset, if there is an upgrade, I hope someone will chime in.

triplewide · 07-19-2018, 03:15 AM

Quote:

Originally Posted by navychaps

So far, mine is still going, I'm paranoid now when it comes to the genset, if there is an upgrade, I hope someone will chime in.

Thor coaches had some issues with generators overheating that were located forward near the engine/exhaust, as I recall the problem was while driving. These were relocated toward the rear of the coach to solve the problem. Newer Forrest River products come with a door vent and boot that improves separation of the intake air from the exhaust air, improving cooling.

This is a Thor 29.3 with a 4k Onan:

http://www.irv2.com/forums/f121/ace-...ml#post3313708

Have about 200 hours on mine so far with out issue. Don't know if this grill fits a larger generator or if they have another size.

Part numbers for this grill and boot:

http://www.irv2.com/forums/f121/ace-...ml#post4295688

Arizona · 07-19-2018, 06:59 AM

I’ve had several RV’s with air cooled onans and have run all of them lots over 110 degree weather for a/c without any problems. That’s what their for. Unless the Rv manufacturer installed it in a way it couldn’t get the airflow it needs, I wouldn’t worry about it.
Travel on

gatorb8 · 07-19-2018, 05:14 PM

^x2!
I run my 5500 onan and 2 AC’s for 10 days straight often in 90+ heat, just keep up on the maintence!

joespapa · 07-20-2018, 09:07 AM

Those 4000 Onan quiet run gensets that are built in to smaller RV’s have a few design flaws. The fuel pump and filter are in a spot(inside the box) that builds tremendous heat. Heat is the enemy. Mine ran flawlessly for 450 hours(in my 2014 Thor Chateau 23U). Had to replace fuel pump and coil. My Onan tech modified it installing pump mounted to the bracket outside the box. If yours is like mine( shoe horned in a tiny spot, be sure you run it with the compartment door open. Hope this helps.

Bloodyhell · 07-21-2018, 09:51 AM

Quote:

Originally Posted by navychaps

So far, mine is still going, I'm paranoid now when it comes to the genset, if there is an upgrade, I hope someone will chime in.

RV forums are good at generating paranoia. I recommend meditation.

TonyMac · 07-21-2018, 10:03 AM

Don't run your genset in dusty conditions, air or water cooled. I have a big rug to place under the genset if we're running it on sand or loose dusty soil. The genset blows alot of air in the process of cooling itself. My thinking is if the genset is blowing air that is stirring dust that the genset is sucking up to cool itself, sooner or later the genset will be full of dust and unable to cool itself.