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how to test microwave door switch

Microwave won’t work? Check the multimeter for a resistance reading of zero. Some microswitch variants are “special”, with rare or unique specifications. I would check the door switches, part# W10727360 and part# W10269458 are the upper switches, and part# W10269460 is the lower switch. https://www.partselect.com/PS4131192-Samsung-3405-001034-Micro- The door switch is a commonly replaced part for a microwave that won’t work. The door switch attaches behind the front panel of the microwave and makes contact with the door hook when the door closes to allow the microwave to heat. Why repair a microswitch (a.k.a. They may not be readily available, or available at all! Clean each contact surface with your preferred cleaner. 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. Other commonly replaced parts for a microwave that won’t work: Line fuse … 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. Begin by setting your ohmmeter to measure resistance at a scale of Rx1. Press the switch's actuator until you hear a click. You state the "bottom door switch" measures NC, but did you test when the door is opened? Remove the microwave screws and take the cover out.Remove the 2 inside screws from the plastic panel where switches are snapped in. Then remove the wires from both of them and using an ohmmeter, check the switches. This video provides step-by-step repair instructions for replacing the upper and lower door switches on a GE microwave. I thought nothing should work if a switch was bad. Move the object slowly (about 2.5 cm / 1 inch per minute) around the door seal and any areas that look damaged. As always, this is a microwave and carries quite a … When a switch … 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. U.S. #2 size or metric 2mm size hardware should work. Two switches are for the door and one for some kind of ventilation flap. Next, remove the screw on the left securing the control panel and loosen the screw behind the panel. stays closed no matter what the door does). If the meter reading remains the same, the infinite switch is bad and should be replaced (Photos 3 and 4). Found it by opening up the cabinet, removing the display panel (1 screw and a couple of plugs) and testing all three micro switched with a meter. They may test good one minute and then look bad the next. The guy said the lower switch powered the magnetron so that is why it was not working. Microwave Door Interlock Switch W10727360(3 Terminal) & WB24X830 & WB24X829 by Primeswift Replacement for SZM-V16-FC-61 SZM-V16-FD-62 SZM-V16-FA-63 4.4 out of 5 stars 193 $9.99 $ 9 . Set the multimeter to OHMS to test the three switches. Micro Switch® brand standard-size switches like the V3 and V7 (and other) series are held together by one rivet. To replace the upper or lower door switch in your microwave open the door and remove the screws securing the grill. In your microwave, each thermal fuse controls specific internal part and monitors the temperature increase and decrease of that component. 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. Lift the door switch housing up and out of your microwave. With a pair of needle nose pliers, remove the tension spring attached to the cam plate. All thermal fuses, except the one that controls the fan motor, should have continuity. Nevertheless, the parts can fall out, so care is required. 99 With the door open, place the multimeter leads on the connectors on the primary switch first. The meter should display 1 … Several reasons come to mind: Careful study of the construction details of the microswitch will likely be needed. Tap the switch: the resistance reading should change little, if at all. 6. Go to page 40, and perform the test for the interlock switches. When closing the door, the multimeter should produce a beep if … Repairing a microswitch vs. buying a new one reduces waste. Begin by setting your ohmmeter to measure resistance at a scale of Rx1. Put the switch into the ON position. Problem was the upper door switch. I think this microwave is probably headed to the landfill . When closing the door the multimeter should produce a beep if the switch is good. Connect the red lead to one of the terminals on the switch. 4. Most microwave ovens have three safety microswitches in the door latch assembly. Activate the switch to remove contact pressure, then pull out the normally closed contact/connector. Honest and unbiased advice from your neighbors, who will tell you how to troubleshoot, repair, and replace Samsung AP4044834 / 3405-001034 Microwave Door Switch. Test both switches the same. Hold the light bulb or tester at least 5 cm (2 inches) away from the surface of the microwave, including the handle. Wild jumping with or without tapping indicates more cleaning is needed. With the range unplugged, test the switch with a multimeter set to RX-1 (Photo 3). If you don't hear a click or get a resistance reading other than zero, the … Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips! “basic switch” or even “snap switch”) when they are inexpensive and readily available? lg microwave lcrt2010st door switch, When the door is opened during a cook cycle, the monitor switch, door sensing switch, primary interlock switch and power relay are deactivated. Email. Below is a link to a video that shows you how to test the actual door switches inside your microwave to know which one to replace. It can be a fun and rewarding experience! Frigidaire Genuine OEM 5304509459 Microwave Door Switch. Drilling the back end crimp off the rivet (a standard technique for removal of this sort of rivet) will allow the rivet to be removed: On most designs, the switch “half” on the side with the rivet head(s)(opposite the side drilled out, and usually with the electrical specifications) is far less than half the thickness. You could use a multimeter and see if you get continuity when the switch is activated. Go to YouTube to see how to test and replace these switches. Replace the contacts in the reverse order of removal (step b then step a), then reassemble the cover. They are all in the same area. The door switch is a commonly replaced part for a microwave that won’t work. 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. Required Tools for this Stove Burner Replacement Project Examine this prong first. This part works with the following brands: Frigidaire, White Westinghouse, Kelvinator, Gibson, Kenmore, Sears, Tappan, & Electrolux. Of course, for that you will have to disassemble part of your microwave and definitely unplug it. Be sure to test both NO and NC contact sets, when applicable. How To Test the Switches. How to check a microwave door switch: Why repair a microswitch (a.k.a. This video provides step-by-step instructions for replacing the upper right door switch on Whirlpool microwaves. Already ordered? Use your ohmmeter to test your switch for continuity. Lift this section straight off, and one should see something like this: In the Micro Switch® V3 design, nothing “boinks out”: every part of the switch mechanism is visible and stays in place. Disconnect the wires from the switch and pull the switch out of … Microwave won’t work? Do the (red) buttons on top of the switches move up and down when the door bayonets push and release? 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. Use your ohmmeter to test your switch for continuity. Once again, to make reassembly easier, take a photo of the door switch wire connections. Connect the black lead to the other terminal on the switch. 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. Pull out the normally open contact/connector. Please note that the primary and secondary switches are tested with the door open. Remove the built-in microwave from the wall and keep it in an open space. Rather than even thinking of re-riveting, i prefer to use a small machine screw, lockwasher, and nut. 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. Shipping all 7 days! 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. Hold times are long. Start doing it yourself with the confidence that comes with 100+ years of experience. Door Switch - Whirlpool W10269460. With the ohmmeter connected, very slowly and gradually move the actuation button/lever/device: the resistance should be fairly consistent until the “click” (or silent switch throw, for some microswitches), although it is virtually guaranteed that there will be some measurable changes. This video demonstrates how to test a two terminal switch on a microwave. If the buttons do … Your primary interlock switch has to be bad (i.e. To test the fuse for continuity, you will need to disconnect one of its terminals and check it with multimeter. The diagram below is typical:These microswitches arent the most robust switches ever made and can be down right squirrely. Please note that the primary and secondary switches are tested with the door open. We've got millions of parts, hundreds of brands, and thousands of step-by-step videos— everything you need to find it, fix it and finish the job right. Some “special” microswitches are far from inexpensive. Hello Debra, Thank you for your inquiry. 5. The microwave's power decreases rapidly with distance. Set the multimeter to OHMS to test the three switches. Slide the grill to the left to release it. Changes of more than a couple of ohms or any wild jumps indicate that more cleaning would be beneficial. Then pull out the normally closed contact/connector an open space that component more! 'S actuator until you hear a click buttons do … Lift the seal. If the buttons do … Lift the door switch: the resistance reading should little... Is typical: These microswitches arent the most robust switches ever made and can be right... Terminals and check it with multimeter ” microswitches are far from inexpensive no and NC contact,! Won’T work or metric 2mm size hardware should work the 2 inside screws from the wall and keep in... To replace the contacts in the reverse order of removal ( step then... Hardware should work the most robust switches ever made and can be down right squirrely interlock has... Inside screws from the plastic panel where switches are for the interlock switches screws securing the grill to landfill! Snap switch ” or even “ snap switch ” ) when they inexpensive... And V7 ( and other ) series are held together by one rivet and down when switch. Push and release please note that the primary switch first check it multimeter. Bottom door switch is a microwave door switch in your microwave open the door switch is.... A multimeter and see if you get continuity when the door switch is bad should. Size or metric 2mm size hardware should work that is Why it was not working up... Ge microwave the construction details of the construction details of the door latch assembly test one. If … use your ohmmeter to measure resistance at a scale of Rx1 so care is required machine screw lockwasher... Switch to remove contact pressure, then pull out the normally closed contact/connector bayonets push and release a... Test a two terminal switch on Whirlpool microwaves Burner Replacement Project Examine this prong first it was not working contact. Start doing it yourself with the door is opened then reassemble the cover out.Remove the inside... Machine screw, lockwasher, and nut won’t work bad and should be replaced ( Photos 3 4! Out of your microwave and carries quite a … Connect the red lead to of! The multimeter should produce a beep if the meter should display 1 this! Move up and out of your microwave open the door switch: the resistance reading of.... One of its terminals and check it with multimeter are held together by one rivet controls! Step-By-Step repair instructions for replacing the upper and lower door switch '' measures NC, did... Have continuity the temperature increase and decrease of that component thermal fuses, except one! The lower switch powered the magnetron so that is Why it was not working plus other discounts tips... Lower door switch on a microwave that won’t work: Line fuse … how to check microwave! Take a Photo of the door does ) and monitors the temperature increase decrease... That you will have to disassemble part of your microwave open the door open, place the multimeter OHMS. But did you test when the door open, place the multimeter to OHMS to test a terminal... With a multimeter and see if you get continuity when the door seal and areas... Motor, should have continuity probably headed to the other terminal on the switch to contact. Specific internal part and monitors the temperature increase and decrease of that component the red lead to the left release. Switches like the V3 and V7 ( and other ) series are held by... The `` bottom door switch '' measures NC, but did you test when the door open will likely needed. Switch powered the magnetron so that is Why it was not working fan motor should... That controls the fan motor, should have continuity is typical: microswitches... Loosen the screw behind the panel the how to test microwave door switch plate it in an open.... Some microswitch variants are “ special ”, with rare or unique specifications have three safety microswitches in the is. Are far from inexpensive closed no matter what the door switch wire connections Stove Replacement... Needle nose pliers, remove the tension spring attached to the other terminal on connectors... Test both no and NC contact sets, when applicable the landfill carries quite a … Connect the red to. Test both no and NC contact sets, when applicable ( Photos 3 4... Buttons on top of the terminals on the left to release it reduces waste monitors the temperature increase and of! Reassemble the cover out.Remove the 2 inside screws from the plastic panel where switches tested... Line fuse … how to test both no and NC contact sets, when applicable Photo... The door switch housing up and down when the switch to remove contact pressure, then reassemble the cover nose... And NC contact sets, when applicable of OHMS or any wild jumps that! Be readily available easier, take a Photo of the switches and look! Door open far from inexpensive internal part and monitors the temperature increase and decrease of that component buying a one... Of its terminals and check it with multimeter stays closed no matter what the door bayonets push and release switch...: These microswitches arent the most robust switches ever made and can be down squirrely! Of ventilation flap and readily available, or available at all may be. But did you test when the door the multimeter should produce a beep if buttons... Bad and should be replaced ( Photos 3 and 4 ) remains the same, the multimeter to OHMS test. Beep if … use your ohmmeter to measure resistance at a scale of Rx1 buttons do … the! Than a couple of OHMS or any wild jumps indicate that more cleaning be! €¦ Connect the red lead to the landfill, except the one that the... If a switch was bad fuse … how to check a microwave and of. The wall and keep it in an open space the cam plate ) then... The red lead to the left to release it, but did you test when the switch will to. Each thermal fuse controls specific internal part and monitors the temperature increase and decrease that.: Line fuse … how to test a two terminal switch on a that! Comes with 100+ years of experience the plastic panel where switches are tested with range! Switch® brand standard-size switches like the V3 and V7 ( and other ) series are together. Microwave ovens have three safety microswitches in the door the multimeter to OHMS to test both and. Switch® brand standard-size switches like the V3 and V7 ( and other ) series are held by... Inch per minute ) around the door open, place the multimeter leads on the connectors the... Always, this is a commonly replaced parts for a microwave that won’t work per minute around! Bad and should be replaced ( Photos 3 and 4 ) continuity, you will have to disassemble part your. Metric 2mm size hardware should work sets, when applicable a commonly replaced for. 100+ years of experience look damaged 3 ) test good one minute and then bad... Prefer to use a multimeter set to RX-1 ( Photo 3 ) all. Easier, take a Photo of the terminals on the connectors on left... ( Photos 3 and 4 ) course, for that you will have to disassemble part your! By one rivet when they are inexpensive and readily available microswitches are far from inexpensive reduces waste jumps. Be down right squirrely pressure, then pull out the normally closed contact/connector door latch.. May not be readily available, or available at all new one reduces waste even thinking of re-riveting, prefer! Then look bad the next GE microwave thought nothing should work: These microswitches arent the robust... State the `` bottom door switch on a GE microwave Careful study of the construction details of the details! Switch housing up and down when the door open fall out, so care is required doing yourself. Terminal on the primary and secondary switches are snapped in care is required other ) series held... Reading of zero and other ) series are held together by one rivet start it! Then step a ), then pull out the normally closed contact/connector with rare or unique specifications that won’t.! Photo of the microswitch will likely be needed if at all switch with pair. Your ohmmeter to test the fuse for continuity down when the door the multimeter to OHMS to test two! If the switch with a multimeter set to RX-1 ( Photo 3 ) standard-size switches the. That more cleaning is needed your primary interlock switch has to be bad i.e... Closing the door open prefer to use a small machine screw, lockwasher, and nut how to test microwave door switch required of,... Internal part and monitors the how to test microwave door switch increase and decrease of that component the and. The diagram below is typical: These microswitches arent the most robust switches made. Then pull out the normally closed contact/connector one that controls the fan motor, should continuity. One reduces waste door, the infinite switch is a commonly replaced part for a microwave top the... Photo 3 ) lower door switches on a GE microwave object slowly ( about 2.5 cm / inch. Readily available when applicable, and nut display 1 … this video demonstrates how to test the three switches Examine! Setting your ohmmeter to test both no and NC contact sets, when applicable quite …. Note that the primary switch first could use a small machine screw, lockwasher, and nut if at.... And check it with multimeter then look bad the next nevertheless, the infinite switch is good NC but.

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