Answer Valet Driver, while the switches work together, they do not have the same job. The primary switch 00617228 allows voltage to go to the transformer, fan, and turntable. The monitor switch 00617229 is a safety switch to prevent the transformer and magnetron from operating when the door is open. The final switch is the door sensing switch 00617230. Read More... Answered by AppliancePartsPros.com | Wednesday, May 17, 2023