Are you hooked up to shore power or boondocking? If you mean that it is not getting cold on LP, turn it to LP only and see if the light starts flashing. I had the same issue after filling my LP tank. Turns out that I had air in the line. I cleared it by turning on my gas stove and continually "igniting" until it lit. If it is shore power then I am of no help since I haven't had that issue (yet)
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