SMH9151WE 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.

Take a decent putty knife or your handy kitchen spatular. Open microwave door and out the outside edge of the dark plastic trim panel, insert the spatula or putty knife and gently pop the panel loose from the small retaining clips. You must do this from the outside edge as that is where the trim panel will release from. Remove the trim panel. Using a flashlight, inspect the metal door frame and find the two Phillips screws holding on the door handle. Unscrew and remove door handle. Lift up on the door latch mechanism, its black plastic and has two legs that slide into the door frame. Between the two plastic poles (legs) you will find the spring, unhook if not broken from the middle of the plastic bracket. You will notice that the metal door frame has three holes. The top and bottom are for the latch mechanism to slide through. The middle is for the spring to latch into (rear or side closest to outside of the door), with the round area which is open, is there for the spring to slide into. Manually slide the door latch up and down. Replace the screws for the door handle if not already done. And reinstall the black plastic inside door trim panel gently pushing into place so that the mounting tabs click into place. Tell your wife you spent all day doing it (its about a 20 minute job) and that you saved thousands of dollars :). Insert popcorn and turn on a movie.

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.

By removing one phillips headed screw, a metal frame pivoted down for easy replacement of glass plate.

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

Searched for a YouTube video that included “replace Samsung microwave body latch” (whatever part name). There are plenty of easy how-tos.

easy to install

Pulled the filters down, measured and went on line- done. was fast to find the part and easy to order...

REPLACED DOOR SWITCH ASSEMLY

I unscrewed one screw and droped the glass light bulb cover, bent the light bulb up so it wouldn't break the glass again, removed the broken glass and installed new glass by bending the tabs over the glass to hold it in place and re-inserted the cover, then screwed the retaining screw back in. Done in 3 min.. PartsSelect.com seems to be one of the few online parts ordering place that has schematics and easy to navigate site. Perfecto!

Based on my research, this over the range miscrowave should have come with 2 templates: 1 for the wall and 1 for the underside of the wall cabinet. The challenge was to measure every very aspect of that microwave in order to obtain placement specs for the mounting screws. Tip: I made the holes through the top cabinet bottom a little larger than needed and used big washers with then for stability to gain the most "play" in the self aligning screws. Worked out well. Took 2 tries to get the wall plate perfect so have precision in mounting that piece.

The tray was exactly what I needed. The price was excellent!

Placed new plate in oven.