You didn't mention the model or type of A/C.
For what it's worth, if you have the Atwood AirCommand A/C, when set on auto and A/C mode, the fan will continually run on low when the compressor shuts off. That's how it is designed. It has two fans and the one that runs when the compressor is off uses very little power on low. There have been several threads on this topic both here and on IRV2. Not sure of your model or type but maybe this helps.
Tom and Karen
Las Vegas, NV
2019 Forest River Georgetown 34H5