Power panel broke?

This fall after winterizing, I put my 2017 179 to rest in the barn and all working. It is plugged in in to 110v and I used the frig as overflow storage around the holidays. This week, I found that the 110v outlets are not working and the frig on 110v does not work(gives alarm).  The converter, microwave and A/C fan and everything else work. I have toggled circuit breaker #5 which controls the outlets and frig to no avail. It's 28F degrees in the barn. Is my power panel dying? Is temperature an issue? How might I test/troubleshoot the situation?  Thanks! (oh how I hate partial failure of things!!)

That was it! Found a red light glowing on the 110v outlet in the bench seat. I reset that GFI outlet and all came back on. Interesting to note the outlets are wired in series so one failing takes everything out. Thank you very much for responding.  

To clarify, the receptacles are not wired in series. If they were they would not provide120Vac. They are wired in parallel just like the ones in your house are. They are however all supplied by the gfci in the one receptacle, which provides protection from ground faults for all of them. That saves money vs each receptacle having its own gfci. It is Code compliant and is often done in homes as well.

+1 to OG.  On my 2015 178 it is the outlet closest to bed, obscured if slide is in