I have a WFCO-WF-8735P and it blows 20amp fuse which is battery circuit my battery voltage is below 10 volts and every time I plug in my shore power it blows fuse. Now I disconnect battery and hook up shore power it doesn't blow fuse. Is my battery the reason it's got a short in it somewhere the battery is only 1yr old deep cycle.
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Which fuse is blowing? The converter is rated at 35 amps. If you aren't the original owner someone may have under fused it by mistake or it was the only one they had. If the battery is in a higher state of charge it won't blow the 20 or if you have lots of lights on some of the current may be going to those devices and won't blow the 20. Check the manual. I would put a 30 in its place based on looking at the converter schematic.
Myron & Deborah
08 HR Endeavor 40 SKQ
2012 Ford Edge Limited FWD 3.5L
Aluminator tow bar, Demco base plate