I always run mine on Low and never really use the Auto mode (well, very rarely). Mine does this even on Low, especially when we first turn the unit on. I am concerned but it seems to always do this. I've been monitoring and think I might have to at least question it. I'm with oldProf....so wondering if there really is a problem.
My previous unit (travel trailer with a 15K BTU unit) never did this. Turn it on and it just ran....
2013 Georgetown 351
Much more significant other....
2 Kids and a dog that rules!