ME21H9900AS (AC-0000) Samsung Microwave - Instructions

Initially I called a Samsung recommended appliance repair outfit to fix the latch. The technician informed me that he does not fix latches. I need to buy a full new door for the microwave for $215 plus he charges $165 to come to my house. I got angry and did some research and it turned out that this is a very common problem. I ordered part PS4229162 "door key" $6.67 then followed the instructions on a youtube video by zimsjeep
"Repair a Broken Microwave Door Latch" to install. At first I struggled a bit hooking up the spring to the frame, but then I used a slim plier to hold the spring (instead of my fingers) and that did the trick.

Removed control panel, discharged HV capacitor. Removed old diode, tested to confirm failure. Replaced part. Other than the removal of the panel swapping the part was almost as easy as replacing a light bulb.

I removed the outer cover and exposed the inner workings. I watched a video on partselect.com to show how to remove and replace the Diode. I followed the instructions and it was very easy to replace.

Unfortunately, the diode was only part of the issue. I ended up replacing the High Voltage capacitor and Magnetron also. Those were a little more complicated but still easy to do.

Now the Microwave works just like new! Cost me less than $100 for all parts.

The high voltage tired was shorted. I replaced it with a new one, but that did not solve the problem.

You can test the high voltage tired with a voltmeter and a 9 V battery. Search Search for it on YouTube.

You can also test the high voltage capacitor, the high-voltage transformer, and the magnetron with a multi meter. Search for the procedures on YouTube.

I tested all these high-voltage components with a low-voltage multi meter, and they all checked out OK (after replacing the diode). However the microwave still did not heat food.

When working on a microwave it is important to unplug it and also discharge the high voltage capacitor. The capacitor has a 10 megaohm resister to automatically discharge itself, but it may have failed – – so discharge it manually.

In the end I ordered a new microwave.

The part should have just been pulled up and out, mine was broke off so I had to drop the bottom tray and push the remaining old coupler up and out. I dropped the new part in and reinstalled the bottom tray. It was also a good time to clean the tray

Ordered (most difficult part of repair, because I wasn't sure the one I ordered would fit), opened box, removed padding, opened microwave oven door, lined up center indentations with center and my repair was complete. Placed a cup of lukewarm coffee on the tray, closed door and pushed auto 30 seconds. The cup went round and round on the plate that went round and round and then, the END chime sounded. Success! Lukewarm coffee has been transformed to HOT coffee on the newly installed cooking tray.

I used my pocket knife to open the package. I opened the door and removed the plate and set the guide down and put the glass plate back.

I ordered a replacement piece. Fits perfectly and rotates as it should. It arrived earlier than planned.

Removed 2 screws at top of grille and removed old grille, and put new grille in the same way and used the screws to keep in place.

We did not use the part, the spring fell off inside the door. We kept the part just in case

I took off the inner plastic frame of the door, removed the broken part, hooked the spring up to the new latch and replaced it into the proper alignment holes, and works perfectly. It was less than a 5 minute repair.

My daughter was trying to run the microwave timer and ended up nuking the cooking tray, which shattered. First web place I found wanted 55$ for this tray and this site sold it for 19.99. It shipped super quickly. I am very pleased with this company!