A fan inside your fridge is the least effective (but cheapest) from of getting better cooling. If your fridge is not cooling you need to find out the "actual" reason that you have a problem. Too much stuff inside preventing normal air circulation might be one. The shelving is open for a very specific reason! Many RV manufacturers did not properly install the fridge and the associated venting system. If there is too much air space behind the fridge, the fridge will not cool properly. That sounds contradictory but the reality is that the absorption fridge is not like any household fridge you might be familiar with. There are very specific parameters that must be met for the unit to work properly. You should list the fridge you have, the manufacturer and whether it is installed in a slide out or not. I suspect there is/was someone dealing with the same problems you are seeing.