Something I found on my class C with the combo fridge is during hot weather, in the summer, it may take longer than one day to cool down to a point it is safe enough for food storage. The addition of a small battery operated fan inside the fridge helped to circulate the air and shorten the cool down cycle. I used a fan similar to this one except I bought mine at the local Walmart.
http://www.amazon.com/Valterra-A10-2.../dp/B0006MRQYU
I still use it during the cool down for the residential fridge in the Challenger.
As a note, I bought the fan 2 years ago and it is still running on the initial 2 batteries and it has made about a dozen 5 day or longer trips.
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