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Old 06-12-2019, 08:07 PM   #1
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Electrical problems

I have a 1999 Fleetwood Bounder 39Z and having issues with electrical. Both air conditioners don't work on generator power. They work on shore power. However on generator power all the outlets work and microwave. I have it at a dealer and they said they haven't worked on older motor homes and said they would have to dig into but he said there not familiar with that setup. I think its bull so i told them to stop. I have an 7.5kw generator and that is working fine. I only see one 30 amp breaker on it. Any ideas?
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Old 06-13-2019, 05:07 AM   #2
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A 7500 should run both of them. A couple of things. You have to have 12v power to the thermostats for them to work. Are the thermostats powering up? When you turn the thermostat to call for a/c and set temp it could take a few minutes to start the units. This is especially true if you have just started the genny. There are also breakers in the main 120v electrical panel. Make sure those are not tripped by turning them all the way off then back on.

I agree on passing on them doing the repair. You can guess at what the problem is for free and older isn't really any different just fewer electronics involved which actually makes it easier.
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Old 06-13-2019, 05:36 AM   #3
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On mine I have a set of 2 switches by the bed, it's a damon so yours may differ. The 2 switches have to be in a certain order if you want to run, just the front, just the rear, or both. Not sure if that helps, but kids have messed with those switches before and really threw me for a loop
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Old 06-13-2019, 05:44 AM   #4
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You need to approach this logically.

Everything works on shore power, but only some things work on generator. First thought is that one leg coming off the generator is not sending power to the breaker panel. Only a few things in between the two.

Get out your test meter, start at the generator, and see if you power on both hot leads coming out. You say you only have one breaker - it may look like one but really be two on the back side.


If you have power at the generator, next stop is the transfer switch. Obviously shore power is going through it properly, but my suspicion is that one of your generator terminals is either burned or loose. Would not be unusual to find both. A defective transfer switch is a common cause of one leg dropping out.


Hopefully that solves it for you.
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