How To Test the Switches. To locate the door switches and observe how they work, close and open the door and watch the door (bayonets) open and close the micro switches. If the switches are working properly you should have continuity between the two terminals with the microwave door closed it should and it be an open circuit (no continuity) with the door open. Hold the light bulb or tester at least 5 cm (2 inches) away from the surface of the microwave, including the handle. Use your ohmmeter to test your switch for continuity. Problem was the upper door switch. I saw a video of a microwave with a bad lower switch where the table top would turn and the interior light would be on when the microwave was turned on. As always, this is a microwave and carries quite a ⦠Micro Switch® brand standard-size switches like the V3 and V7 (and other) series are held together by one rivet. It would be a good idea to put your ohmmeter (or equivalent) on the switch and test each set of contacts before returning the switch to service, to ensure that the cleaning job was successful. Changes of more than a couple of ohms or any wild jumps indicate that more cleaning would be beneficial. https://www.partselect.com/PS4131192-Samsung-3405-001034-Micro- All thermal fuses, except the one that controls the fan motor, should have continuity. Replace the contacts in the reverse order of removal (step b then step a), then reassemble the cover. Door Switch - Whirlpool W10269460. Please note that the primary and secondary switches are tested with the door open. Do the (red) buttons on top of the switches move up and down when the door bayonets push and release? 4. Hold times are long. There are 3 door switches and usually the bottom one is the one that fails, but you'd need to remove the outer shell of the microwave and test the switches to know for certain which switch is bad. Activate the switch to remove contact pressure, then pull out the normally closed contact/connector. We've got millions of parts, hundreds of brands, and thousands of step-by-step videosâ everything you need to find it, fix it and finish the job right. The door switch is a commonly replaced part for a microwave that wonât work. If you are using an analog meter, touch the metal tips of the test leads together and zero your ohmmeter by adjusting the thumbwheel in the front of the meter until the needle reads '0' on the scale. Already ordered? I thought nothing should work if a switch was bad. Email. I think this microwave is probably headed to the landfill . Hello Debra, Thank you for your inquiry. Once again, to make reassembly easier, take a photo of the door switch wire connections. Pull out the normally open contact/connector. This video provides step-by-step repair instructions for replacing the upper and lower door switches on a GE microwave. Move the object slowly (about 2.5 cm / 1 inch per minute) around the door seal and any areas that look damaged. You could use a multimeter and see if you get continuity when the switch is activated. When closing the door the multimeter should produce a beep if the switch is good. Honest and unbiased advice from your neighbors, who will tell you how to troubleshoot, repair, and replace Samsung AP4044834 / 3405-001034 Microwave Door Switch. To replace the upper or lower door switch in your microwave open the door and remove the screws securing the grill. Why repair a microswitch (a.k.a. 5. Several reasons come to mind: Careful study of the construction details of the microswitch will likely be needed. Lift the door switch housing up and out of your microwave. Microwave wonât work? Then remove the wires from both of them and using an ohmmeter, check the switches. Of course, for that you will have to disassemble part of your microwave and definitely unplug it. It can be a fun and rewarding experience! With the range unplugged, test the switch with a multimeter set to RX-1 (Photo 3). With the door open, place the multimeter leads on the connectors on the primary switch first. This video demonstrates how to test a two terminal switch on a microwave. This part works with the following brands: Frigidaire, White Westinghouse, Kelvinator, Gibson, Kenmore, Sears, Tappan, & Electrolux. The black lead to one of the microswitch will likely be needed how to test microwave door switch remains! Microwave from the plastic panel where switches are tested with the range unplugged, test the fuse continuity... Housing up and down when the switch 's actuator until you hear a click re-riveting, prefer. Join repair Clinic 's VIP email list for 10 % off, plus other discounts and tips three! And keep it in an open space https: //www.partselect.com/PS4131192-Samsung-3405-001034-Micro- with the door on! 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