Whirlpool washer not spinning
Whirlpool-family top-loaders fall into two groups. Older direct-drive machines (also sold as Kenmore 110 models) have a motor coupler that shears and a lid switch that wears, and either stops the spin. Newer vertical-modular washers use a shifter actuator that fails and throws F7 E1. Front-loaders stop spinning when the door lock or a drain fault (F21) holds the cycle.
Usual fix: Motor coupler or lid switch (direct drive), shifter actuator (VMW), door lock or drain pump (front-load).