A bad converter?
2011 Coachmen Brookstone, 50 amp, with a Progressive EMS-HW50C inline that I installed 6 years ago. This last camping trip of 4 days to Ludington Michigan State Park. 30 amp service. It seemed n...
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The RV fridge is plugged into a receptacle outside behind its vent cover. You could unplug it so it can't be involved while you continue your GFCI fault search.
Perhaps you can by-pass the garage GFCI receptacles and try it with the bathroom's? Long extension cord to RV shore power adapter on cord
As you have been doing, it is all about eliminating suspects one at a time. GFCI receptacles themselves can start to act up. You might have been onto something when you noted the GFCI did not pop until you turned on something that drew a few amps, but did not pop with a low amp draw, and it didn't matter what you turned on that popped it.
What was that surge all about anyway? That could have been a factor.
Perhaps you can by-pass the garage GFCI receptacles and try it with the bathroom's? Long extension cord to RV shore power adapter on cord
As you have been doing, it is all about eliminating suspects one at a time. GFCI receptacles themselves can start to act up. You might have been onto something when you noted the GFCI did not pop until you turned on something that drew a few amps, but did not pop with a low amp draw, and it didn't matter what you turned on that popped it.
What was that surge all about anyway? That could have been a factor.
