On our UHaul
VT, we have a previously owner-installed GFCI outlet on the outside of the trailer for lights
and other accessories. It has worked well last camping season, but recently has been screwing up regularly. When the original unit wouldn't respond at all to the reset button on our first trip this year two weeks ago, I replaced it with the same GFCI unit from Menard's (20 amp). Now, it works for several hours, then trips the breaker, shutting off the external LED lights
around our screen house. That is all we're running off the outlet and it's tripped both while we were off at the VW show yesterday and again overnight (we leave the LEDs on to light
up our screen house tie-down lines so people don't trip over them in the dark). I can push the reset button and it works fine again for several hours. It's tripping when no one is around or we're asleep, so we're not banging the trailer around causing vibrations (I thought there might be a loose wire making alternate contact). It's sitting perfectly quietly when it trips with just the two 10 foot strings of LEDs. I would think a short would cause an immediate tripping of the breaker, not a "slow leak.". Any ideas?
(Additional note, it just tripped off while I'm typing this and my wife had her laptop plugged into the outlet. However, it's tripped when nothing but the LEDs were plugged in, too.)