Just guessing, based on the date of manufacture of your trailer, your fridge might have been one of 900,000+ that were in the Dometic recall. To be sure, go here
with your model # and serial #.
Unfortunately, the recall was only to install a device that prevents a secondary fire from occurring when the cooling unit springs a leak. The recall does not do anything to prevent the leak from happening.
If it is any consolation, you are not alone
in your disappointment.
Be sure to replace your refrigerator with one made after September 2006. This gets you out of the affected range of "recall refrigerators".