The lift motor housing broke on the vent in our rear bathroom, so I replaced it.
Here’s the vent, with the decorative wooden cover open:
The broken housing:
I ordered a new motor from Amazon (cheaper than from the Tiffin parts store, though availability may be spotty):
Removing the old motor:
Above that, the lift mechanism, which had become detached (causing the breakage):
The motor just plugs in to a couple of connectors:
The new motor and housing in place, after re-mounting the lift mechanism:
All better:
An easy fix, and as a bonus, it’s quieter now when opening and closing the vent.