When we left for our first real shakedown trip the ride height would not work. The travel light was on but tires were up against the floor. Manually set height and took off. When we were set up at the campsite I pulled the HWH cover off and touched the 7 1/2 amp fuse and it arced in the holder. Turned the engine on and the ride height started working. Pulled the fuse and could see the clips that held the fuse were spread more than should be, closed them with small needle nosed pliers and re-inserted fuse. The system has not acted up since.