Thank you, very helpful. And just a safety reminder that the capacitor in all microwaves is a high voltage one, it holds charge even when the whole system is unplugged and it can seriously and dangerously cause electric shock.
I hypothesize that your magnetron wasn’t the problem but it was the door switches which caused it to keep running without a fan and overheat your magnetron to the point it blew the thermal fuse and cracked your magnet.
I think you are right except of the door switch. Think about new, properly working microwave. None of the state of the door switch (off/on - open close) should not cause cooking mode (if the timer is off)
Same problem with my GE microwave, only 2 years old. I'm getting tired of the garbage appliances lately, not only by GE, but by just about every common brand. It's like they all got together in a meeting and figured out a way to maintain competition amongst each other while still ripping off consumers.
I had the same issue. Just 4 years old with a GE model JVM3160RF2SS. I felt lucky that it was me that heard the noise the first time. Someone else may not have recognized it as a problem which could have easily created a fire.
I just had this problem arise when I was replacing the door handle. I replaced the handle and closed the door and it started running. After unplugging and replugging the unit in, it still was started to run when I closed the door. I found out what the mere problem was. I thought I had properly fitted the inner door gasket or frame on the inner part of the door but I did not. After making sure that inner frame or was properly fitted....it solved the problem. Before tearing your microwave apart or getting a NEW one, maybe its just that inner door frame that is not properly fitted.
Just fixed my microwave with this video thanks for reminding me about the cracked magnetic problem I thought I had other issues lucky I had a spare magnetron and it works now for how long not sure
I'm so annoyed at this problem right now. I'm just going to unplug the damn thing and plug it back it back in when I need to use it. A royal pain in the ass
While trying to figure it out (reset circuit breaker in panel, google, youtube, GE reviews) one reviewer said they slammed the door a little harder than usual........and the problem went away. One month later, microwave still working.
A lot of people consider this as a helpful. How did it help other than to take a decision to throw out microwave. Did you replaced magnetron with the broken magnet and it did help? It does not seems help to me since magnet is a consequence but not the main reason
@@u-tub7072 From this, I found that a small piece of paper folded up and taped to the frame, kept the door away from the frame. This resolved the issue and I didn’t have to throw it away. I was going to pitch it until I saw this.
@@JeffScherer treat this as a coincidence: You had completely different problem with your microwave (does not cook when it is supposed to work), vs the microwave of the topic-starter (cooked when it is not supposed to, before the magnetron burnt due to non working cooling fan)
I think you made a wrong conclusion in the end about the broken ring magnet caused all you problem. It is more important what you said in the very beginning: you had two stages: 1) Cooking all the time when door is closed 2) Nothing works. I guess at stage 1 the inner fan that is cooling magnetron did not work. This caused overheating of magnetron, then failure of the ring magnet and only after that turning off heat fuse. The main reason is in something (relay or other switch) which is turning magnetron without inner fan.
I have a Samsung microwave with similar issue. With closed door it makes buzzing sound and when I put water in it it makes it hot. No light inside when door is closed. In my case a relay on control board was defective. It was sending power constantly to the the element that creates microwaves. The relay model# f5h-dc12v-p1
thanks for the video. I think I have a very similar issue. My Microwave makes a buzz/humming noise when we close the door and now its not even heating anything up when we run it. So we unplugged it.. I am also assessing if we should just purchase a new Microwave instead of trying to figure out if the Megnatron or something else is the issue... Do you have any recommendation?
if it is still running after you open the door , it may be the 2 micro switches (latch) on the door ( some of them have 3 ) or the main relay inside to turn on power. Don't play power on magnetron, power transformer or the capacitor its about 5000v and easily kill humans............. due to this problem while door open it it is working there is radiation hazard.
My guest likes to stop the running of microwave by opening the door on it's way of running and then left with the door open until one day I found it makes sound after I closed the door . The microwave can't stop making sound after I close the door and became very hot hours later . I have to unplug the microwave so it stopped . I replug ,the same issue happens again . I don't know what's wrong with it . I have to call someone to check .
Were you able to fixed that problem?..what was the cause of this prob. Coz i facing the same issue. With my Samsung micro oven. Plz.if u can answer what was issue finding?
Same problem. I don't understand why the microwave would still heat food with a broken magnetron. Why was the magnetron running unless power was being applied? I'm curious if the broken magnetron was the effect of something else in the circuit or in the controls.
Robert - the magnetron probably broke from running without any food to heat. It overheated and cracked, plus blew the thermal overload that he showed jumpered out. Same thing would happen if you ran the microwave empty for a few minutes. Usually it’s a sticky main relay or bad control board that will need to be replaced that is causing it to run without clicking on the popcorn button or something else.
Exactly ! I suspect the issue may have been one of the 3 door relays allowing the microwave to run after shutting the door. This may have then caused the magnetron to fail.
@@bmoore3199 Ok. This same thing happened today on my Kenmore microwave. It was caught (noticed) immediately. It still cooks with the door closed, so it works. I'm starting with the switches after reading your comments. Thanks.
@@highqualityhomemaintenance7565 any luck on yours? I just changed the switch latch that holds the 3 switches and after the replacement, when I close the door the microwave starts by its own and won't stop
Had a similar issue, pretty sure it's the control board power relay. No way that thing should be running automatically. Mine I think died with the monitor interlock switch, it was completely seized closed which is fed by the power relay. I replaced the switches (all 3) disconnected the power relay and everything seemed ok but of course no magnetron. Anyway, this is #2 of the same model, first one had the door switch issue. Complete garbage.
I take that back, I know it was the power relay. I unplugged it, heard it click, now the unit completely functions. No way I can trust it though with a bad relay.
I replaced the magnetron and the microwave would cook perfect but then the Cooling fan world not self activate. I would have to manually turn it on. After trouble shooting i determined i also need a new key pad/control pad. With that additional cost i ended up buying a new microwave.
I pressed turn table off for the first time and now the thing won't stop running. There are forbidden buttons you shouldn't press on microwaves apparently
