Hi Unlike a toaster, which performs the exact same function over and over, washing machines run through elaborate cycles with multiple settings. The devices that control these cycles can occasionally fail. Here's how to repair some of the common switches and timers.
Servicing the Lid Switch

The lid switch on a washer often serves as a safety switch. If the switch is not working, or if the switch opening in the lid is clogged with detergent, the machine will not run. To check and repair the lid switch:

Step 1: Unplug the machine. Clean out the lid switch port with a wood manicure stick or chopstick. Clean off any detergent buildup around the rim of the lid. Sometimes there's enough detergent encrusted on the metal to prevent the lid from closing tightly and keep the washer from operating.

Step 2: If cleaning doesn't help, remove the top of the cabinet to get at the switch. With the switch exposed, check the screws for looseness. Loose screws can cause the switch to move when the lid is closed or as the machine goes through its cycles. Check the terminals of the switch to make sure they're tight. Tighten the mounting screws after the switch is in alignment.

Step 3: Test the switch with a VOM set to the RX1 scale; procedures for using the VOM are detailedhere. Disconnect the power leads to the switch terminals and clip one probe of the VOM to each terminal. Close the lid of the washer. If the meter reads zero, the switch is working. If not, the switch is faulty and should be replaced.

Step 4: If necessary, replace the lid switch with a new one of the same type. Connect the new switch in exactly the same way the old one was connected.
Step 5: If the switch still doesn't work, it is probably misaligned. Realign the switch by repositioning the screws holding it in place, testing the switch as you go until it works properly.