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Old 06-15-2011, 10:28 PM   #1
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Any solutions for converter high-pitch whine?

DW and DD hear the ultra-high-pitched noise from the WFCO converter when no load is present. It's very bothersome to them. I'm not hearing it (but I'm a former rock and roll musician). I've done some googling/searching and I'm not finding any resolution other than to turn on a light (to add a load) or replace the converter. Has anyone ever experienced this and come up with a fix?

Oh yeah, it's not the fan...
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Old 06-15-2011, 10:38 PM   #2
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I have a PD 4600 that has a whim/hum but I am not sure how one overcomes this.

Al
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Old 07-04-2011, 10:04 PM   #3
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I've got the same issue as dlhoppe. High pitched electrical whine from converter, regardless of load, and it's not the fan. I disconnected the battery to see if related, and no effect; still does it when only connected to 30amp. I disconnected 30amp and reconnected battery... whine goes away. Ideas please? Driving the wife and kids nuts.
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Old 07-04-2011, 10:15 PM   #4
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My first thought is a capacitor beginning to fail. If you are not afraid to remove the covers and look you might find a bulged or swollen "can" looking part. Fan noise is a different sound.

Replace if under warranty; repair if not (or upgrade to a higher amp unit if you feel the need).
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Old 07-04-2011, 10:20 PM   #5
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Thanks Lou for the quick repsonse. Unfortunately I'm about as handy as... well, let's just say I wouldn't know a capacitor if you put one on my plate. I failed to mention that I have a 2011 8317RKSS. Used about ten times, but guessing a problem can happen at any time. Definitely still under warranty, but just set it up on a seasonal site about 4 hours from dealer, so was hoping it was something simple! Alas...
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Old 07-04-2011, 10:31 PM   #6
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High frequency whine or squeal is normally an overloaded cap. It could be something else (that caused it to overload) so even a repair is no guarantee it will "stay fixed".

Replace if under warranty.
Call the dealer (and pray they will work with you)
See if they will send the power converter by mail with a swap out so you won't be off line longer than it takes to rewire the power center (could take a few hours by a local electrician or handyman).

Otherwise you will be towing it to them.
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Old 07-04-2011, 10:34 PM   #7
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Thanks again Lou... think I'll wait until end of season and tow it to them. Based on everything I'm reading in this entire forum, guessing I'll have more issues by then anyways!
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Old 07-04-2011, 10:39 PM   #8
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Larry,

I hate to say it but you might be smarter to get working on it now. If that cap fails, it can cause a blackout in the camper at best or start an electrical fire at worst.

On the bright side; after the loud "pop"; smoke and flame; it will stop whining.
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Old 07-05-2011, 05:45 AM   #9
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FYI- Lou is right as usual. The "Caps" that Lou is referring to are called electrolytic capacitors. As they age, they often leak and weaken. This is why it has worked fine and may slowly develop issues. When these electrolytic caps blow, they can bulge at the top, blow out the top, or blow the whole can off the cap. The last one is one of the few things in electronics that we technician still haven't mastered, and that is getting the smoke back into the cap. For some reason (still unknown to this technician), when the magic smoke in the electronic components gets out, it is nearly impossible to get it back in. Once the smoke gets out of one component, others may go also, but the equipment stops working. So, as Lou recommended, I would get it to a shop if it's not under warranty. It may be a cheap repair now, but if that smoke gets out, that will cost ya'!
If one of the caps is leaking, you can see an oily substance on the circuit board around the capacitor (I use a magnifying glass to see it), and it often holds dirt. The electrolytic inside the cap is corrosive to the circuit board and can damage the board with long term exposure to the electrolytic. Depending on the capacitor, most are less than $1.00 USD. May be cheap now, expensive later (if that is the actual problem).
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Old 07-05-2011, 07:43 AM   #10
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Thanks Kirt,

I had to use my "Way Back" machine to dig that bit out of my gray matter.

As to the "smoke" joke, that brought back memories too.
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