There are several things folks often overlook
First make sure the intake filter(s) are clean. if they are dirty air flow is reduced and some A/C's have "Frost" detectors. these detect when the evap starts to Ice up (or rather they should) and shut down the compressor... That sounds like your issue.
Second make sure the condenser (Rooftop the part that gets HOT) is clean.. For different reasons.. IF I Were making an A/C i'd include an over pressure sensor. I do not think Dometic did but that's how I'd do it.
Finally Fan on high.. Not low. Not auto Two reasons.
First.. Your problem.. Fan on high might fix
Second.. Yes I know it is noisy but it's very close to "White noise" which means your brain, given a few minutes, will filter it out.. and what's more that fan noise will cover the compressor so you won't be as annoyed by it cutting in and out be it short or long cycling (you will hear it but you might need to pay attention to do so) Also when your next site neighbors get into a knock down drag out.. You won't hear that either. (Trust me on that count... Throwing things through the window level fight and I never heard a thign).
