[Bostongone]

I assume that the trailer has been run off of this house GFCI breaker with no issues prior to this. I am not sure if the 268RLSWE has 30 or 50 amp service but the first thing I would do is to plug it into a non-GFCI protected house circuit. That will help determine if you have a major current fault or a sneaky leakage circuit. If the non-GFCI breaker trips then simply shutting off all the breakers and then turning them on individually until the house breaker trips should find the current fault.

If no breakers trip on the non-GFCI house breaker then you probably have a leakage fault. My guess would be the hot water heater element even if you were still were getting hot water at the campsite.

To diagnose you would need to plug back into the house GFCI breaker and see if it does continue to trip. If it does then with no power to the trailer you need to access the heater element and remove BOTH wires from the heater element by removing the protective cap and removing the screws. With the end of the leads taped for safety turn the house breaker back on and plug the trailer in “hopefully” the breaker will not trip and a new element should fix this issue.

If the GFCI breaker continues to trip then some other AC item must have a leakage fault. You should unplug any AC device where you can access it’s AC plug. I believe the refrigerator can be unplugged by removing the exterior access panel. If this fails to stop the GFCI breaker from tripping you may need some help from a friend who knows some basic AC repair or familiarity because the next step I would do is to go into your AC panel and open each breaker in turn AND lifting the white neutral return from the neutral bar for that AC feed and then apply GFCI power to the trailer. Doing this for each branch should find the “leaky” circuit.

Sorry to be so verbose but if you do have a leakage issue this is I believe the easiest way to find it.