microwave fuse blown
Arthur Rubinstein. Because of the high voltage and high current used by microwave ovens, be aware that repairing this appliance poses a substantial risk for injury or death if precautions are not taken. Earlier this winter it started happening at -10C. The M02 is probably faster opening so it is better. This can usually be achieved by removing 2 or more screws from the top of the microwave, then lowering it and lifting it off a mounting bracket. You will need to remove the grille or control panel to access these fuses. Slight looseness of any mechanical detail or door misalignment can cause the power still applied when middle switch shorten power and blow up the fuse. oldturkey03. The holes for the screws were slotted to allow some movement. Once you’ve determined that the GFCI outlet isn’t what has caused a lack of power to your microwave, one issue might be a blown fuse in the microwave. If the touch pad on the microwave becomes unresponsive, the microwave produces little to no heat, or the appliance simply does not turn on, it could mean that your fuse is at fault and needs to be replaced. Over time the hooks from the door latches wear away where they meet the white housing. I tested if there is HF power when I open the door with a piece of aluminum foil (not very reliable method). I didn't want to glue or other permanent attachments, so that i can replace the switches if they do go bad. This is a 20-amp fuse, and is used to power your microwave. It is overkill, because another switch (top one) opens when door is open and cancel 120AC power from outlet. 2nd board worn out in 4 years! The door safety latch mechanism on your microwave contains several small switches. WARNING: Do not attempt unless you have training in appliance repair. The door safety interlock switch is bad or the connection terminals at the magnetron capacitor is loose causing arching/intermittent voltage surge. Make sure the clip holds the fuse snugly. 11/08/2020 by My plastic latch area was worn only about a 1/32 " but that was enough to cause the blown fuses. If that was your case there would be some understanding of why you could be tripping the circuit when you open the door in microwave but I don't think that's your case. How would U attach it? But only when opening microwave door before loading food. It is ridiculous schematic to prevent microwave to work with even slightly opened door - one hundreds of inch may counts. The first step of the procedure will depend on your model of microwave. Order new capacitor, simple installation. It is 21-th century, people! In my case the top hole wore down faster than the lower hole causing the switches to release at different times when the door is opened which will in turn send a power surge to blow the fuse. You should avoid touching the blade when doing this. If the fuse does not have continuity, replace it. Charles Fryer So far (and Iâm knocking on wood here) even though we are going through a -20C cold patch, the microwave is continuing to operate without blowing a fuse. plus replacement parts are exorbitant. Igor Blokhintsev, Arthur Rubinstein Your microwave has what engineers call interlock switches that disable the oven when the door is open. CR-FUSE CRFS20A, 20A, 125V/250V (6x30mm) Slow Blow Glass Cartridge Fuse for Microwaves,Compatible with All Microwaves (5-Pack) $7.99$7.99 Get it as soon as Wed, Sep 23 FREE Shipping on your first order shipped by Amazon Lastly, if you still have problems, I would change the capacitor (DANGER - capacitors hold a potentially deadly charge). Follow these steps to restore power and get those appliances going again. Terms — I found the Monitor switch, the middle of the 3 switches on mine not always working properly. Just committing suicide. As others have said, timing or adjustments are critical, and this wear pattern disrupts correct operation. . Has anyone altered the board by installing a hard wear surface? Since you have a limited electrical knowledge I would recommend replacing the unit strictly on the grounds that is much safer than having a microwave burn down in your kitchen. After replacing the monitor switch (KW3A normally closed from ebay) the fuse did not blow when opening the door to interrupt a cook cycle. If your fuse is located behind the control panel or vent grille, you may be able to access it without removing the microwave from its installation. Some things which indicate this is the case include. I have had the door switches out and don't appear to be bad. Arthur Rubinstein I do not see where CASPER YOUNG directed anything toward your answer or toward you. If you don’t resolve the underlying issue, the new fuse will blow too. I almost have up before I saw your post. You should test the microwave on an unoccupied circuit (that is one that has little or nothing plugged into it most likely a garage). Seem to be ok. I checked it with a resistor … I need to check the door switches. I think I have the same wear problem on the latch board with my GE microwave that is blowing fuses if I open the door. In several such case the switch can weld contacts together and fuse will be blown every time when plug into outlet. Check your door first, easier than replacing the relay. I checked it and now no blown fuses. either applied to the tip of the latch or, preferably, glued to the worn portion of the latch board. My guess is that the cold weather caused them to shift such that when the door opened they did not open/close in the right order. I was thinking about adding tin or something similar. You could try a ceramic delay burn fuse it is not your standard fast blow fuse. @jim143. If the device were to trip the circuit all by itself that would mean that there is a short within the microwave and the door could be all or part of the trigger. If you read my answer, it said the fuse was blown, not that the circuit breaker tripped. I have a master's in electrical engineering, and although I hate the concept of crowbar circuits, I understand they are a necessary evil. The new fuse must have the same ampere rating as the original; one with too low a rating will blow immediately, and one with a higher rating won’t stop dangerous current. Join the Repair Clinic VIP email list for updates and special offers. A qualified repair technician is highly suggested to service your microwave oven. Not sure that this switch is necessary at all. Dewey Nistler. @nickyboy. Jim Laudanski. Better yet, if you don't know what you're doing (obviously because you removed it) you should spend a few hundred dollars and just go get a new microwave. No, but I modified the tip of the lower latch itself by adding some 2 or 3 layers of duct tape. Jim Laudanski, Jim Laudanski How to replace Capacitor. 10/21/2020 by I saw that the bottom or third switch was very loose. I bent and glued a very thin piece of metal ( from an old floppy disk slide cover - PERFECT thickness) over the worn plastic area about 6 months ago I believe...so far still working fine...thanks to all who brought this to my attention, I thought the fuse flowing was a bad diode or capacitor. We have short people in our household, so the door is often pulled from the lowest angle possible, likely contributing to uneven wear and flexion of the door so that the bottom comes out before the top. I assume your replacement fuse is the proper type and specific rating. January 20 by Thanks, Charles! You should be able to spot the culprit in this case by looking for an outlet or … Tried fuse, it does not blow untill cooking starts. Changing fuses several times a day is not an option, otherwise you will move fuse outside enclosure and have dozens of those. Check the Fuse First. HELPING DO-IT YOURSELFERS SINCE 1999. I do not see where it was said that "you" have a limited electrical knowledge. Since high voltage capacitors used in microwaves may retain a charge even after the microwave has been unplugged, we recommend that only experienced professionals access and replace internal components. Brad Riching. I think almost all microwaves have a 15A or 20A fuse at the inlet power cord. So do I just replace the fuse again and hope it’s going to be okay. You can use a multimeter to test the part for continuity. Serena Arnold. If there still power, it just blow the fuse. It is overkill, because another switch (top one) opens when door is open and cancel 120AC power from outlet. If the microwave oven has power going to it and it will not work, the fuse is … Last year, this started to happen more often, when we were only at -20C. Temporary Solution: I was able to temporarily fix this (and confirm it is not a capacitor problem) by adjusting the position of the white switch housing so that the top is tilted back, and the bottom is closer to the door. Accessibility. Mine tooâ¦never had a microwave to auto trip circuit when open door in middle of cooking time to check n stir food ..;@ All shuts off completelyâ¦.Safety precaution maybe But all these years cooking with a microwave Never had this problem until buying this brand typeâ¦Had GE before this worked just fine for almost 15 yearsâ¦Just gets very frustrating to try to remember turn off before open door to check food After in habit many years doing without circuit shutting down ;@ Also happens to my husband & son because we are use to opening door checking food then reclose door tap to finish cooking & no need to restart all cooking time again to finish cooking â¦,like the way use to work for many years before no problems !!! As a result - AFTER UNPLUGGING - I can replace a blown fuse in about two minutes without tools. Built-in Microwaves Step 1 It could be a simple issue with the microwave having a blown fuse or it may be time to get a new microwave oven. Attached a picture of the worn piece. So pushing stop may not help. They must be out of sync, somehow. If any of the door latch hooks is broken or any of the switches is faulty, the appliance will not operate. . I replaced the capacitor. remove cover and check main fuse with ohm meter. My Frigidaire gallery microwave keeps blowing fuses, the first time it did it was about 3 weeks ago, we got it about 14 months ago, I replaced the fuse and it blew again 1 week later. Much appreciated! To access the door switch, you will have to dismantle the cabinet but only after unplugging the appliance. Most homes have circuitry that's limited to a 3000w per set and you can have multiple sets such as when set runs the ceiling lights other sets run other rooms walls or sections of the house. The control board slides onto slots (as you know) and doesnât need to be screwed in. 04/13/2019 by At least all mechanical design must be much, much more simple and reliable. Stevan Rounds, Sorry i need to add that i only secured the second and third or middle and bottom switches, Nick Nishino When I open the door I can hear the dual switches on the bottom disengaging first, but I was able to glean from Igor's post, the top switch needs to disengage first (or at least all at once). You can also visit our repair help section for videos and articles that can further assist you in your repair. The door was sagging a bit before the fix but it blew another fuse on startup. If it was faulty, nothing would work. Can be opened anytime not in heating part of cycle. I ended putting duct tape into the actual cavity and so far it has stayed. Contractor's Assistant: Do you know the model of your Frigidaire microwave? Never after heating cycle was completed. After trying everything else (and I mean EVERYTHING), I noticed the worn latch and started experimenting, opening and closing the door very slowly and listening for the switches to activate. I hope this helps others. Fuse does not blow if I end cycle with the cancel button. Believe it or not, I simply wrapped some duct tape around the tip of the lower black plastic latch. I began noticing that fans starts and plate rotates for one sec when I opening the door. 08/16/2018 by I shimmed them so that the switches were better fixed in place and would trigger in the required order. If you cannot access the fuse you need from behind these panels, you will first need to uninstall the appliance. Remove microwave from oven cabinet. Second I would replace the plastic piece holding the switches. We carry parts for all major brands, so you’ll be able to keep your appliance running great, no matter the problem. Set it on a sturdy surface, and then you’re ready to continue. An Overloaded Circuit. 04/13/2019 by Mounted in plastic so should not short to ground. If the control display comes on, you’ve replaced the fuse successfully. I found this thread and the next time the fuse blew, I took a look at the switches and found that they had some play in where they were positioned. That will blow the fuse. I got rid of most of this slack by loosening the 2 screws that holds the bracket for the door switches and making sure the bracket was pushed down (against the two plastic overhangs that only let it go down so far) and simultaneously pushed back into the microwave so that the door would close tighter. I fixed it with a small low profile bolt and a nut with lock washer in a pre-drilled hole behind the door when you remove the door. Same with the shield in front of the fuse. That still did not correct the fuse blowing but I think it was one reason. Mine does the same stuff. In my case on my 3 year old unit the top hole of the plastic housing was very slightly worn down. 12/10/2020 by Thank you. Turn the microwave on and see what happens. Replaced all the door switches, even though the originals checked out ok. If fuse does not blow it will still trip the 20 amp circuit breaker. Perform a visual … and the problem was solved. To replace the fuse, connect any necessary wires to the new part, and secure it with any clips or fasteners if necessary. The fuse is located in a small receptacle with two wires running to it. @blokhi. And they will save your life when absolutely needed. Had the switches out. Same with the upper plastic piece over the door. This caused one of the lower switches to activate a fraction of a second sooner . If the meter’s needle does not move, or the digital display does not change significantly, there is no continuity, which means the fuse has blown and will need to be replaced. Opening the door while on is another option to stop the cooking cycle. My fuse blowing was a result of one of the two interlock switches failing. . Microwaves are complicated appliances, and they can be a challenge to repair, even for experienced DIY’ers. But if want to be on safe side - better buy more reliable MW. @jhcanada. The door is opened by pushing the open button on the control CAUTION: BEFORE REPLACING A BLOWN MONITOR panel, refer to … It is double protection (not necessary for my opinion). A faulty door switch which is also often called as an interlock switch is the part which signals the other parts to turn on when the door gets closed and to stop when it is opened. Just out of curiosity, did you try replacing the latch board (https://www.geapplianceparts.com/store/p...) as well? One of the possible reasons for microwave stopped working and no power could be an issue with the door switch. Long term solution? I found some other strange behavior that was related to the door sagging (see my comment above) and also how tightly the door closed. Thanks fo the comment. If you determine that the fuse is faulty, the next step is to replace the part. Find fuses at Lowe's today. @chuckfryer. A spot where our concurred should be noticeable you are in fact creating a surge which is what trips the breaker and this should be noticeable if you were to get inside it. That switch simply short 120 AC power when door opens. That was going to be my next step before seeing your post. If you overload a circuit, your system will cut off the electrical flow to prevent circuit damage or a fire. 08/14/2018 by My over is 2 years old Model FGMV 155CTD. Comments are limited in size so read the next comment also... 05/15/2019 by There are two terminals which must be … Thank you Igor!! Check capacitor with ohm meter, after properly performing capacitor dischagre procedure. My fuses donât blow, the breaker trips. How old is it? Look for the fuse inside the exposed controls of the microwave. I had the same problem with a 3 year old GE Microwave. And all is that done by mechanically operated switches located on plastic support. Our 5-year-old over-the-range GE microwave has been blowing fuses, but I think that your input has helped resolve the problem. Igor Blokhintsev. Remove the fuse from its clip and replace it with a new one of the same type. BTW, I have seen the occasional ceramic microwave fuse 'blown to pieces', so even those aren't immune - but I've repaired a LOT of microwave ovens over the decades. Seems that is UL idea for double killing. A couple years ago, when it was really cold outside (below -30C) it blew a fuse when the door opened. Secondly, what kind of fuse does a microwave use? At 120 volts it would only take 2400 watts to cause a 20A circuit breaker to trip. Replace the panels or covers and secure them with the screws. I have this same problem in my microwave, and though I haven't had time to fix it, I decided that rather than subject my family to this risk, everyone now presses the stop button before opening the door. You should always unplug the microwave before you attempt any disassembly. Be aware that the failure of the fuse often indicates that there is a shorted electrical component in the microwave, such as a failed door switch. If the fuse is blown, that’s usually caused by another malfunction. between when it started to be housing and the middle of the two connection. However, there are several repairs that can be performed to keep your microwave running properly. Yes it gets cold. Thanks Jeff, what kind of glue did U use? My microwave oven had a similar issue. How would I find the schematic for this?
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