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Old 12-02-2010, 05:12 PM   #1
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WFCO AC/DC converter

I've noticed thar my batt. Slowly runs down over a long period of time. I read somewhere that the converter has a humm to it when operating. I have yet to hear such. So today while laying in the floor getting the Model # of my furnace. I decided to open the door on my converter and have a look. I noticed the bottom breaker was not on. It is marked CONV. It is a double switched breaker. The top switch on the bottom breaker will not set. It breaks before you get the switch pushed over. Anyone know about this. Its a WF 8955 AN.
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Old 12-02-2010, 05:52 PM   #2
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I wouldn't keep on trying to reset it. It tripping due to a short . If you keep on trying to reset the breaker can sometime make the breaker fuse & it will have a melt down. Can cause a Fire. I think it the 12v charger in the conv. Not 100%
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Old 12-02-2010, 07:17 PM   #3
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I went out and did some experimenting. Unplugged power and unhooked batt. Breaker stays on and doesn't break while switching on. I plugged in power. Breaker throws while flipping switch. I unplugged power and hooked up batt. Breaker works that way. The bad thing about the whole deal is this TT is an 07 model but has never been used. Older couple bought it new and never got to use it due to accute health problems. All tape and stickers still on appliances. I wonder about warranty on converter.
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Old 12-02-2010, 07:20 PM   #4
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remember, if you don't have a battery disconnect switch or undo the battery cable, the trailer's parasitic power drains will discharge the battery in just a few days.
this is if the shore power isn't hooked up or as you may suspect, the converter is not working right, even with shore power.
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Old 12-02-2010, 10:00 PM   #5
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Charge the battery with an automobile charger, and see if it holds. My converter will throw the breaker if the RV battery is severely discharged. I can usually reset it and be ok. I am assuming the previous owner let the battery completely drain, and it may be no good, even possibly shorted. You might try to disconnect the battery and see if the breaker will stay "set". You don't need a battery if you have shore power. There are other post on here about testing a battery, do a search, but I would disconnect and the battery and try it. Make sure you isolate the positive cable as it will have voltage on it if the converter works.
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Old 12-02-2010, 10:13 PM   #6
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It is also a possibility that the battery cables are hooked up backwards. They are black and white on some campers, and the black wire is positive on those. I had a Coleman popup that was hooked up that way. It was confusing, to say the least! Randy
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Old 12-02-2010, 10:56 PM   #7
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windrider has a good check list. If this problem last you may want too get some new battery. If the old owner left the battery drain a long time it hard to get lift in them & if they have a short it will kill the converter. If your rig has slidout it best to have batteries to help with the 12v load.
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Old 12-03-2010, 07:22 AM   #8
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i'm leaning toward the entire converter being bad. when ur pluged into shore power, does everything work? do the lights continue to work when the battery dies?
i'm trying to figure if the converter is supplying ur trailer when on shore power or the battery. if the converter is working, u probably wouldn't know the battery is dying until u disconnect.
batterys at that age can be a problem if u disconnected the bat and it still kecked the breaker when pluged in, that doesn't sound like the bat.
i would probably replace the converter. (if ur handy with electronics, u may go into the converter and repair it if ur not, replace).
if you aren't blowing individual fuzes, it sounds like externally ur ok.
sounds like the problem is within that converter. what i don't know is if they use the same caple i would suspect that they would.
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Old 12-03-2010, 08:45 AM   #9
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The electrical stuff works plugged in are not. (The DC stuff) . The AC stuff works plugged in (microwave, fridge, air) . I have not tried the furnace. Only when plugged in does the breaker throw. Battery hooked up are not. I'm thinking a lightning strike are something in the past because the A.C. control switch had no low are Med. I replaced it and fixed that issue. The breaker was thrown before I replaced switch. I have not let the batt run completely down. The batt monitor just shows it to be getting weaker over the period of a few days.
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Old 12-03-2010, 09:11 AM   #10
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I'd pull the converter out and check all the wiring. It could be just a shorted wire or one got hooked up from the factory in the wrong place and it's never worked (yeah, I know that counts as shorted too ). If you still have problems, give Best Converter a try. They are very good at helping people with converter problems.
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