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Old 01-03-2012, 12:19 PM   #1
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Buzzing sound; LED light related?

We've got a 2011 25' Eddie Bauer. It's got factory LEDs in all light fixtures.

When connected to shore power there is a very subtle buzzing sound that seems to emanate from the LED lights when all of the lights in the trailer are off. When any light is turned on, the buzz goes away. This does not seem to be the fault of any one light, at least we can't track it to one light. The sound is subtle and as loud in the sleeper area as the dinette and all points in between.

The sound is gone when on battery power.

The sound is there whether on shore power at my home, or at a park hookup.

Any ideas what the cause of this is?

To me it's no big deal. The sound is barely noticeable over my rock-and-roll induced tinitis. But it drives my wife crazy.
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Old 01-03-2012, 12:38 PM   #2
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"sounds like" it's the charge controller, if there's noise when you're hooked up to shore power, and there's no noise when you're not....

try unplugging the power cord to your charge controller when you can hear the noise you're trying to find, and see if it stops?

best,
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Old 01-03-2012, 03:16 PM   #3
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How about the power inverter? Changes the 120 vac from your house to 12 vdc. Seems like a possibility since you only hear the noise when you are plugged in. My parents (non-airstream) has the same (or maybe not) annoying buzzing sound. I thing the guy at the trailer store told them that they could just replace it with a new one and it would take care of the problem. Good luck with the problem solving. Cheers.
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Old 01-03-2012, 07:14 PM   #4
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I doubt that it is the lights that are buzzing. It is the converter. It is probably one of the out of date Univolt converters, which will cook the batteries. Locate the culprit and replace it with a modern 3 stage converter.
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Old 01-03-2012, 07:31 PM   #5
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If these are the dim-able LED lights, it could be from the dimmer controller that works electronically. The slight load from any incendecent light or any other electrical load will damp out this buzz.
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Old 01-03-2012, 07:37 PM   #6
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Quote:
Originally Posted by dwightdi View Post
If these are the dim-able LED lights, it could be from the dimmer controller that works electronically. The slight load from any incendecent light or any other electrical load will damp out this buzz.
This was my first thought.....do they have dimmers. I added a digital dimmer to my reading lights over the couch. They buzz a tiny bit when the radio is on, but not with it off.
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Old 08-07-2012, 12:33 AM   #7
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Thr buzzing is becoming quite irritating ... no help from the dealer
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Old 08-07-2012, 04:22 AM   #8
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You might try switching circuit breakers OFF and removing fuses, one at a time, until the noise stops. Then, you'll at least know which circuit is causing the buzz. After you figure this out, post what you find, and others may be able to provide more accurate suggestions.
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Old 08-07-2012, 08:22 PM   #9
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I finally figured out what that buzzing noise was. As someone replied (and I didn't see because I didn't check back until just now), the "buzz" was actually the fan cooling the power inverter/distribution panel.

As our departed friend Rosanna Rosanna Danna used to say, "never mind."
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