Based on the minor things I had wrong with my unit, I would light up all the stove burners, and make sure that the blue light works at the power cord plug in. Also check the water filter for leaks. I had one of my pass through doors leaking rain water. Look over the roof, for cracks in the sealant very easy for me because I have a rear ladder. At the very least make them upgrade you to a group 27 or 31 battery. It only costs about $10 for the box and the price difference for them between a group 24 and a group 27 is maybe $25. Hope this helps. Jay