I have a Maytag Refrigerator that cools off and on. I can hear the motor and afn running, no leaks. It is model number PSD263LHEW

Try cleaning the condenser coils by removing back and washing them out with spray soap and water, like a hose nozzle. Here are some manuals: https://dl.dropbox.com/u/8010163/Maytag%20Refrigerators.zip