In article , Bruce L. Bergman
says...

The only way to reverse rotation of an open shaded-pole motor (just
like the ones used in bathroom 'fart fans' and cheap range hoods) is
to take it apart and reassemble the rotor and bearings so the shaft
faces the other side of the motor, that way the copper wire pole shade
is on the opposite side of the motor.

Well there is one other way. You cut the shading ring so it's no
longer continous. Then the motor can be started by hand in either
direction.

We had a dishwasher where the timer motor had this defect. It would
run in either direction, at random, when started. Sometimes I would
have to 'start' the dishwasher several times before it would head out
in the correct direction.

It was also ill-advised to stop the machine in mid-cycle, and restart
it. The standard joke was that it would run backwards and make them
dirty again.

Jim


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