I've talked to a couple RV dealers lately. Seems Dometic has had some real issues. One blamed it on out sourcing to Mexico. One yesterday said it was the change to 410A refrigerant. Said they didn't change anything other than refrigerant on the units. So, this is my deduction.....out sourced to Mexico to change refrigerant. Wonder if this might be a cooling issue? I've never fooled with 410A, but IIRC, I've seen where it runs higher pressures, and needs more condenser cooling surface.
2013 Chevy 3500HD
2012 Rushmore 38CK