I replaced my Dometic refrigerator with a residential style and I am wondering if I should block of the side vent that is in the exterior wall. The roof vent should allow any heat to escape.
It depends on the design and installation of the fridge.
Some the condenser coils are on the rear of the fridge.. if yours is like this I would put a fine window screen on the outside vent (on the inside side) and also on the roof vent to prevent insects and other creatures from getting in and seal to the sides of the fridge inside so winds do not blow by.
If the condenser coils are BELOW the fridge (Stupid place to put 'em but some do) Well, you are on your own there.
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