Allways inspect the magnets and make sure there not cracked , and look at the tip of the magnetron (Its Antenna) to see if its been damaged, Allways remember the ouptut of the microwave transformer the Capacitor and high voltage diode are in an extrermly high voltage an high current voltage doubling circut and use proper respect when working around them, there are some cases where the Capacitor can hold a deadly charge even when the microwave is unpluged (Allways assume its charged), those leads are connected to the magnatron and you can get hammered when you try and remove them. The Capacitor "must be proven safely discharged" before removing those leads ..
My understanding is that when the microwave pops when starting up it could be the magnetron? How likely would that be? We had a short power outage and now it occasionally makes that loud popping when trying to heat something up.
Mine was reading all ok and according to your test and there was no sign of physical damage as i was sure and had tested transformer, diode and capacitor i went ahead and replaced magnetron and it fixed the issue, so it can read all ok yet be defective.
You just saved me from buying a new microwave! I had tested it and gotten the right ohms. Was about to buy a new one and found your video. I removed it and it was rattling. Thank you!!
My dad had a cheap microwave from a supermarket chain, here in England. It was only £30 brand new - I'm going back 5 or so years. The magnetron had failed but it was £25 to replace it. The microwave went in a box. Some day, I might be able to get a cheap microwave and have it back in service.
An LG 2M246 magnetron can be used as a direct replacement for a Samsung OM75P (31) magnetron even though they say you CAN'T, LG parts is cheaper than Samsung.
My 3 y/o GE microwave recently stopped heating, checked everything (diode, capacitor, 3 switches, etc.) - all passed the test, but upon inspection of the magnetron metal radiators, I noticed some slightly burnt surfaces including some part of the metal housing but again it passed the test like the video described here. In the end, I replaced the magnetron with the new one. Now, the microwave is working again.
Mine too! A PEB7227SL. I lucked out and found a brand new PES7227SL (Stand alone model) at Nebraska Furniture Mart which I was able to modify slightly and fit into my built-in.
How to check a microwave magnetron: check everything else. Door switches, fuses, relay, transformer, temperature sensors, high voltage capacitor and diode. Why? Cause you’ll know for sure those are bad with just a multimeter and a 9v battery. If all those test good, it’s the magnetron. You cannot test a magnetron with just a multimeter. There’s a possibility that it’s still bad regardless if it tests good from what’s shown. Picked up a junk microwave to flip for cash off criegslist. It didn’t heat, and everything tested working even the magnetron. Ended up getting another junk microwave, after testing all the new parts, started swapping in the working parts. Ended up swapping the magnetrons. The first microwave started to heat again. The 2nd junk microwave only had one bad door switch. First junk microwave, everything tested working, or so I thought. Lucky since the some microwave parts aren’t cheap, hv capacitor, transformer and magnetron to be exact. One of them fails, means you need to fork over 1/4-1/3 the cost of a new microwave.
In this instance it's most likely the filament terminal capacitor/socket that's bad. That part of the magnetron is replaceable and can save you alot of money
@@KSparks80 Damn, you're right. I have seen other videos about these tests where the important visual information was blocked. Maybe I got them confused. Now where are my glasses....
My magnetron is reason 90 ohms terminal to case is it functional or should I replace it, the diode on the capacitor was bad. I just don’t want to put the microwave back together if the magnetron is bad too
On my combi oven the microwave only works if I have first warmed up the convection oven. If it starts from cold the microwave resets after 3 sec. I replaced the magnetron but same problem. Any ideas/suggestions please? 😀
that means your magnetron is burnt, for a good magnetron the measure resistence betewn point and case must always be infinity, otherwise its burnt, there is a way you can repair your magnetron, search at youtube, there are few videos of repairing
Hello friends. My microwave oven does not display power. When the oven door is opened, the rotation motor is driven and the lights are turned on. Nothing heated while the display was in good condition. I don't know what the problem is. Advise or help me.
There are typically four ways a magnetron may fail. The test in the video can find two of these faults but passing those tests by no means guarantees the magnetron is good. What the test can find is if the filament breaks and if the filament has sagged and contacted the anode. There are two more ways it can fail. One is that air leaks into it so it no longer has a vacuum and will arc inside instead of making microwaves. Such a failure will not show up with the continuity check except in some cases where the arcing inside the magnetron has melted something and caused a short circuit to be created between the cathode and the anode. In that particular case the continuity check will show the fault. The other, much less common fault is that the magnets lose their strength. That usually happens because for whatever reason the magnetron would have overheated and the over temperature cutout didn't do its job. With this type of failure sometimes the oven is just much less effective, still heating somewhat but much less than it should.
Awesome reply. My Panasonic micro is showing H98 code. The magnetron shows continuity terminal to terminal and terminal to case on both. I'm assuming that is not how it should read and had shorted.
@@BlondieSL If it's a short of any kind, I would advice replacement. My understanding is that these are not serviceable and I wouldn't want to risk a questionable fix at the frequencies these operate at. Replacing my Magnetron did the trick for me.
@@BlondieSL The short answer is no. The longer answer is that it is possible but difficult, requires special equipment and not worth the effort. The short is usually caused by the filament sagging and touching the anode. You would have to cut open the tube, replace the filament and then evacuate the device and re-seal it. The last part is the most difficult and needs specialised equipment the bring down the pressure low enough for it to work. Commonly available pumps such as used in the HVAC industry do not create a good enough vacuum.
Hi everyone, what the problem if microwave keep burning transformers .l did change diode, magnetron, capacitor but nothing change please help my email lovejenami@gmail.com.
Holy shit, the amount of people on here complaining about covering the readout on a SOUND continuity test is infuriating. These people shouldn't be allowed to take their microwaves apart.
