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.