Your setup may be similar to ours. You have a remote switch (inside the coach), a transfer switch (next to the inverter), and the inverter (ours is in the water heater compartment). I would first make sure the inverter is on, that the plug is firmly seated in the outlet, and that the GFI is not tripped on the inverter itself. I would say check the back of the remote switch because there is an ignition lockout switch, but since it was working before it shouldn't matter. Like Iggy said, you can unplug the refrigerator from the inverter and plug it into a good known source of 120v. Let us know how it goes.
2014 Georgetown 351DS
-TruCenter -Front/Rear CHF -Hellwig Links -Tiger Trak -Ran McNally GPS -ScanGauge -Truck Systems TPMS -5 Star Tune