I have a Kenmore (Sears) Laundry Center 417.94712400
- single unit with the washer on the bottom and the dryer on top.

The washer tub doesn't turn at all, and therefore the spin cycle doesn't operate. The agitator turns, but not the tub. When working properly, the tub can be turned by hand during the fill cycle and when the washer is not on (one direction, CCW looking down at the tub).

The fill and drain cycles work.

With the front panel removed, I can see that the motor tries to engage (after the audible solenoid click), but the tub won't turn at all, in any operational condition. The drive belt is in position.