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Old 05-26-2013, 06:53 PM   #11
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Location: Camano Island, Washington
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suggest you Google: "The 12 Volt Side of Life I & II". you'll learn a lot about the electrical system in your trailer.
the short answer is yes. you have somethings that are only 110vAC and somethings that are 12vDC.
the a/c(if you have it), the microwave, the 110v outlets only work on shore power or a generator.
somethings can run on both, like the fridge.
the lights, furnace, roof fan, electronics for fridge/water heater DSI run on the battery.
the converter will simply recharge the battery to run these things when on shore power.
if you have a bad battery, your converter will not be able to keep the battery charged, therefore your 12v things will stop working.

Dan-Retired Firefighter/EMT
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and Zoe the Wonder Dog(R.I.P.)
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Old 05-26-2013, 07:13 PM   #12
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It is more likely a bad converter. If the converter is bad is will not put 12 volt out to the trailer. A full charge battery will discharge over nights if the converter is not putting out 12 volts. When you get the trailer set back up again. Plug the trailer into the TV and try the furnace. If the furnace runs ok you most likely have a bad converter.

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Old 06-17-2013, 08:17 PM   #13
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Typically that is correct. Additionally, most campers also have a charging circuit for the battery. You might check for a charger, or if one doesn't exist, take a 12v charger and connect it to your battery while plugged in. Be sure to check for an existing charger first though as two chargers at the same time would not be a good thing.

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