That hose is a condensate drain from the inside of the fridge. The end of the hose should sit inside the black tray. The heat generated from the gas absorption fridge inside the chimney should be enough to evaporate the little bit of water that collects in the tray. You should check that little black plug a couple times a year to make sure it isn't plugged.
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2013 F-150 EcoBoost MaxTow, Roush tuned (415hp 506tq), lifted on 33s, R.A.S.
2013 Jay Flight 28BHS Elite (Equalizer 10K hitch)
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