[Canonman]

Looking at your floor plan, it looks like your fridge is in the passenger slide out. Also, it appears to be a residential type running on 110vac and not an absorption type. There is a big difference in how the two types operate but if you are using shore power, you should have no trouble keeping a residential fridge at 40 degrees. Is the freezer keeping things frozen? Have you checked the freezer temp. Most residential fridges move cold air from the freezer box to the refer box. Adding fans for air circulation in the fridge box or adding fans to assist with removing heat from the outside of the fridge via the exhaust vents will help absorption fridges but won't do much for residential types.