QBD fridge temp

Just recently bought a QBD fridge this weekend. Cleaned it up and works like a charm but in my opinion its a little on the cold side. I have my drinking beer and my cellar beer inside and it hovers around the 36/38-40/45 degrees Fahrenheit. I have it on the lowest possible setting before turning the cool off. It has a dial ranging 1-9 but when playing around with it the temperature didn't really change from the 32-40 range. Wondering if there was anyone out there with experience with this brand of fridge or maybe a way to know how to fix it? I'm thinking the thermostat is probably either off or not on right. The lady I bought it from said it has been sitting for two years and hell it could just be dirty inside but id have to take it apart to get inside there and I'm not comfortable with doing that since I wouldn't know where to start. Any input helps thanks guys.