The reason I ask about elevation is because we had our new Sabre at 10,000 ft. in Colorado on our shakedown trip this August when the regulator started a whistle type noise and the fridge stopped working on gas. I tried everything I could think of to get the fridge working, but never did, even at a lower elevation. The rig has been at the dealer getting warranty work done and I was told last week they could not find anything wrong with the fridge and if I heard the service manager correctly he stated something to the effect that the electronics need some time to readjust to elevation. Don't know if I believe that or not but I personally tested the fridge on Friday and it worked fine and no noise. I had a Jayco travel trailer that never had any problems at elevation. If I remember correctly the water heater in our rig has an elevation disclaimer about getting it re-jetted for use at elevation (but I might be wrong about that) I have attached the instructions for the gas regulator in my unit, you might check to see if you have a similar one. If the problem happens again I think I will swap out the regulator, not a fortune of money to replace.
Good luck, keep us posted. Always good to know the outcome of these issues.
2013 Ford F-350 SD Diesel, 4X4, Crew Cab, Lariat
Sabre 2014 32RCTS, Pullrite Superglide 2900 18K