RV Gurus - need help

Just purchased a 1998 Jayco RV for a deer camp. I work with the guy I bought it from- he is good people and would not screw me. The fridge is not working. He used the camper on the 4th of July and it worked then. It is a norcold brand model 9162. It runs on 110v plus propane. When I push mode to AC the light slowly blinks, and when I push it to propane, light does not blink. The small boiler does get hot around the Side behind the panel, but does not cool the unit. I know nothing about these things. Any advice helpful.