[folivier]

I think you're right Tom. The Aquahot uses the 12 volt pump system to preheat the engine. I'm sure Paul has the series 60.
What size breaker is the one that is tripping?
Did anything change before this happened? Any new items plugged into one of the affected outlets?
Try plugging the freezer into an extension cord, or just unplug it to see if that is the problem.