Greg for Model Number SMH1816S/XAA-0000 The microwave makes a humming noise when you close the door even though no cooking instructions have been entered on the key board. I believe the faulty part is the pcb main assembly/relay control board. I will purchase the part number DE-02329F from you. Can you tell me how to disassemble the control panel to change the part?
Answer Hello Greg. Remove the grill off the unit. Then remove the screw securing the control panel. Lift upward and off the unit to remove it. You will need to test all 3 door switches. It sounds like one is bad on the unit. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Thursday, January 26, 2017