Josue D. for Model Number mmv4205BAB I just replace the magnetron, the old one was crack. Now I used the oven and after I took the food out I close the door and I can hear it huming it did not go off, I open door and close it and it still keeps on humming. It sounds like the trasnformer still in the circuit. Help me, thanks j. Diaz
Answer Hello Josue. Based on the information you provided, it sounds like the door switch WP3405-001034 is bad and will need to be replaced. Hope this helps. Read More... Answered by AppliancePartsPros.com | Friday, January 13, 2012