Back in the day my old TTs’ roof vents: hand crank open/close & push the on/off button… no maintenance and worked every time. Easy-Peasy. My last two TT’s: automatic roof vents with remote controls...
I installed a Fantastic Fan with a wired remote. The remote was mounted next to the over-cab bed of our Class C so nobody had to get out of bed to change anything. The Fantastic Fan also had a moisture sensor so we could leave it open when we left for the day and we didn't have to worry about rain. We came back to the RV many times to find the vent closed and turned off and we didn't know that it had rained, but after asking the neighbors, they said that it did.