Top mounted RV freezer's like to be kept full, minimizes freezer frost build up and helps with cooling the main frig below.
I keep (4) 2 gallon freezer bags full of ice in the freezer to take up the empty space....., add delete as needed.
Bob
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2016 GM 2500HD 6.0L/4.10
2018 Jay Flight 24RBS
2002 GM 2500HD 6.0L/4:10 (retired)
2005 Jayco Eagle 278FBS (retired)
1999 Jayco Eagle 246FB (retired)
Reese HP Dual Cam (Strait-Line)