How to Troubleshoot & Replace Samsung AP4245180 / OM75P(10)ESHL Microwave Magnetron Assembly

Took the cover off and noticed a spot that looked burned. From the side I could see some "thing" underneath. Figured it was some kind of Flux Capacitor. Pulled it out and googled the part number and discovered it was actually a Magnetron. Saw a picture of a new one that looked nothing like the fried, burned one I had, found the part on this site, appliancepartspros.com and the price was the best I could find so I bought it. It arrived the next day! I had taken the the Microwave out to the garage and the wife thought I was throwing it away. She was researching the price on a new one - over $500 - while I replaced the bad part. $65. Next day she came home and I had reinstalled the Microwave above the range. Boiled a glass of water and I got a hug and a peck on the cheek. I was hoping for a little more, but after 27 years of marriage, I'll take what i can get. 

I had to remove the microwave from the range and then remove the cover from the microwave to determine the exact problem. After a visual inspection then discharging the high voltage capacitor, I used a meter to test the high voltage diode and fuses. After using the meter to ohm out the magnetron, I removed it from the unit, and seeing that the hole in the end of the magnetron's tube was enlarged and burnt, as if it was arcing, I assumed it was the bad part. I ordered the parts from Appliance Parts Pros and replaced them in the unit. It works like new. 

I had a idea it was the magantron .when it was on the cook cycle it made a loud Hume . I open the cabinet made sure the capsator was discharged and removed the magantron .when out observed end was burned out . Look online found the one I needed ,installed it and put the oven back in service. 

So easy. 

I found on the web that the growl I heard when I tried to heat water, unsuccessfully, was a bad magnetron. But I wanted to replace the HV capacitor and diode also on my 10-year-old GE Profile Microwave Oven. The service I received from Appliance Parts Pros.com was superb. Quick delivery and easy repair got my oven back in like-new condition. Thanks for your help APP.com! - Maury Logue 

I knew from a previous repair the magnetron was the issue. Used appliancepartspro website located the part and order. Quick delivery and part exactly as described. Replaced in about an hour and microwave is working again 

Looked up what was most common problem. Watched video on microwave repair. Used multi meter to check parts.checked bad, ordered new one and installed. Works great. 

Replaced the HV diode first then the Magnetron. Advice: check multiple sources to learn OEM part numbers and search/shop based the OEM part numbers. Had I purchased the exact GE part numbers I would have spent $35+ on a $5 Diode and $150 on a $75 Magnetron. I must add I have a background in electronics and mechanics and as a DYI'er was confident in my cross reference knowledge and part selection. If you don't have the experience to know the difference a call into support before purchasing parts is advised. Bottom line: our 2007 $800 GE Profile over the range microwave is now fixed for less than $100 bucks and we did it ourselves thanks to diagrams provided and our DYI background knowledge thank you very much APP. 

Replaced three year old magnetron with a new one , i got 10 years out of the first one but i cook more with microwave now . 

I read a lot online about what could be wrong and what it would take to fix it. The youtube and chat centers were a big help. Once i thought i could do it, i ordered the part put it in and it worked. Hardest part was keeping track of all the screws and nuts and trying to figure out where they all go back.