I found the primary interlock switch faulty on arrival, replaced and still had the same issue. The fan that comes on when the magnetron is active is only turning on when you open the door. I confirmed all the micro switches were functional at this point. My experience in the past is that one of the switches would cause this. I am suspectin that I am missing something here.

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What have you tried so far?

Verifying interlock switch functions, replaced primary faulty switch.

Request Resource Materials
Service diagnostics guide, Wiring diagram, Service bulletins, Service pointers

The easiest way to verify your issue is to follow the flow chart on page #26 in the service manual link below. It will take you step by step. Matt Ace technician

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