Dometic Refrigerator only year and a half old not getting cold

I was out dry camping in my Coachman Travel Trailer this weekend and found that my Dometic Refrigerator was not getting cold. I tried it on both auto and gas only buttons and nothing. It was working perfectly fine at home and there was good flame but the unit just wasn't getting cold. I just bought this unit a year and a half ago and would really hate to have to buy another new one. Any help would be appreciated.