We recently experienced this. We simply turned the fridge off for a few minutes. When I turned it back on, I switched it from 110 to gas and let it run for 24 hours, assisted by a few cooler ice packs. It came on down and then I switched it back to 110 and turned the gas off. This may not help in your case, but ... it's worth a try.
2015 25' Eddie Bauer
2015 F250 TV-Petrol