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Old 03-26-2018, 10:08 AM   #1
Montana Master
Join Date: Apr 2009
Location: Ardrossan
Posts: 724
M.O.C. #9261
Question Dometic Fridge Frost Build Up

Over a period of 2 1/2 months our fridge has accumulated a lot of frost/ ice on the fins of both the freezer and fridge compartments. The two switches inside the freezer area are for different ambient outside temperatures I assume. The I must be on and the O must be off, is this correct? What actually do these switches do? We do have the manual but it is very vague. If the switches are on will this prevent ice accumulation?
We have a 2009 3400RL with the single door fridge.
Any help or experience would be appreciated. Thanks Ellis
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Old 03-26-2018, 04:21 PM   #2
Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 2,891
M.O.C. #13740
I can't remember what the dometic was like on my old diesel pusher, so no help for you on that. When I still had my norcold in the montana, I would use a plastic scraper to get rid of the ice in the freezer sections. Usually serious frost on the fridge fins means door seal is leaking air into the fridge.
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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