AC fan not kicking off

Hey everyone. My husband just replaced our main ac unit with a new Dometic Brisk AirII. It works great, the compressor kicks on an off, but the fan runs continuously. Is there something we did wrong?? He checked the thermostat, and says he put it in the same place as the old one was. Thanks for any help.

The fan should be set to auto not hi or low.

Thanks, thats what i thought. We had to put the rv back in shop for bad weather but will check this weekend and let you know.

Ok, my 22 yr old son figured it out. Fan set to high i stead of auto. Feeling kind of old!