If it's new he needs to call Keystone Customer Service, they replaced my breaker with a bigger one under warranty. If a larger breaker is needed it's always good to have Keystone do it, just in case it causes issues down the line.
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
2017 3500 Dodge Maxi DRW 4X4, Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, etc.
Wew have a 2005 3400RL and after a few years, the slides would stop some times. If you released the switch for a couple of minutes, the process would resume. I replaced the breaker on the advice of a dealer and the problem stopped. I went to a heaver breaker to handle the longer run time and heat generated in the breaker. I have not had a problem since. Just a point to check out.