Dometic rooftop AC operation

Thanks guys. Here's the scenario...Turn it on,fan is on auto high.Runs normally till it cools the MH to what would be close to thermostat setting,compressor kicks off,fan still running.One,two minutes later,compressor kicks back on for a minute or so,then off again. The frequency of this cycle speeds up like earlier stated.I'm sure it's the compressor doing the cycling,fan never quits. Drives me nuts so I get out of bed and turn down the therm and everything is good till it cools down more ,then back to cycling. I would think there would be a wider gap for the off,on compressor relay switch in the thermostat.My thinking is the compressor should run without cycling till the desired temp is reached. Replacing it is my next move...wished I would have remembered to write down that model number.