When an unbalanced condition occurs, the switch closes the circuit to the switch in the off-balance position. This removes electricity to all the washer's functional parts, stopping the cycle and thus avoiding a costly repair. The user then must redistribute the load more evenly in the washer tub, pull the timer dial out to de-energize the solenoid, and allow the switch to rest, and the push the timer dial in. This again closes the circuit to the normally active parts of the washer and washing machine.
In the UK it’s very hard to get circuit diagrams or repair manuals. I get many emails from people looking for repair manuals and wiring diagrams for white goods appliances, but they are only available to the trade. Even then they are commonly only available by opening a trade account, paying a subscription and logging online into a manufacturer’s secure technical support web site. Another common way the trade can have access to them is by subscribing to them on DVD, which isn’t cheap, and needs renewing every several months or so. Gone are the days when we used to buy the wiring diagrams and repair manuals in printed form.