If you have this frig access door, take it off and look to see if there is a lip on the bottom that will prevent water from leaking into the compartment area. Over time, that water will destroy the wall below the frig.
Although Mine is a Class A, this same door and its problem is used on a lot of different MH and TT.
The top photo shows my original door frame with no lip, The lower photo is the after I added a lip to the bottom to keep water from running in under the door.
This is how I added a lip to the bottom of the door:
Fixing Frig exterior access panel door leaks | 2001 Coachmen Mirada 300QB
This is how I repaired the water damage caused by this door:
Repairing Delamination and water damage | 2001 Coachmen Mirada 300QB