Apparently the MaxxAire Mini is significantly more "voltage sensitive" than the "conventional MaxxAire vent fans".
Here is a post from another forum: https://www.cheaprvliving.com/forums....php?tid=31123
I suppose I've been fortunate in not having any of these "not really built for the towable RV, but too often used anyway" fans.
IMHO (for what it's worth) I'd take the "mini vent" out while the taking is good and install a "real MaxxAire vent or a Fantastic vent"
From what I can determine, the Mini-vent series was intended for use in "van conversions" where "streamlining and small domes are important"....