My automatic pool cleaner, which used to work flawlessly (except for big
leaves getting stuck in the throat) now gets stuck at the steps in the
shallow end. This began right after I replaced the pods. The cleaner
has new pods, feet, flaps, and wings. It appears that the cleaner is
not longer turning, but just travelling in a straight line all the time.

The pool store near me will diagnose it for free, but I won't be able
to take it in until Friday, and even then, the person who is actually
competent at repairing them isn't there all the time. Any suggestions on
what I can try before then? The suggestions in the manual haven't helped
(adjusting vacuum, turning the flap adjustment to I and III, adjusting
hose length).

-Jonathan