X2 on the installation issue. I had that problem and finally found a dealer willing to do the warranty work.
The install has been corrected and the fridge cools much more efficiently in warmer weather and the fans don't need to run constantly.
But I also have a problem with little to no cooling in cold weather, but Dometic has agreed to replace the control board under warranty, now that the install has been corrected (they repeatedly blamed the cold weather issue on the install which seems to be their standard answer to everything) so hopefully that will solve the problem.