MMV5000ADW Maytag Microwave - Instructions

Husband replaced the bulb

I had to unmount the over-the-range microwave oven to be able to gain access to the interior of the oven. Complicating removal (and re-installation) was the fact that there is a "pot-filler" faucet installed directly underneath the oven. In retrospect, I should've removed the faucet before doing the repair, but "c'est la vie."

After I got the microwave down, removing the case was also "interesting." I get bonus points for the fact that the previous owner must've had to replace the same diode before - and then re-assembled the microwave case incorrectly - thereby adding to the confusion (BTW, the service manual that I found online said nothing about how to remove the oven's case).

To remove the case, undo all the screws holding it on, and then rotate the case upwards from the back while also pulling the case backwards. There are crimped folds on the inside of the case that mate with the back edges of the front of the oven's chassis, and these folds have to be unclipped from the chassis in order to remove the case.

Replacing the diode itself was the easiest part of the job. The two connectors on the diode are of different types, making it impossible to install the diode with the wrong polarity.

BTW, the diode that had failed was not an OEM diode; I suspect it was a generic component that had been installed by a repairman sometime between 2004-2008 (when our home's original owners still owned the home). On the other hand, the new diode from PartSelect is an OEM part (it came packaged in a sealed Whirlpool bag).

The fact that the oven had stopped heating indicated that it was either the high-voltage diode or the magnetron that had failed. Since a replacement diode costs ~ 1/10th as much as a replacement magnetron, I figured it made sense to replace the cheaper part first. Fortunately, this fixed the problem.

One last thing: I tried testing both the old and new diodes for conductivity and polarity using my volt-ohm meter (VOM), but I was unable to get either diode to "turn on," even though my VOM is powered by a 9-v battery, and I used the 2-Mohm range setting. I guess the test voltage of my el-cheapo VOM isn't high enough to exceed the diode's threshold voltage, (even though I have successfully used this same VOM to test low-voltage diodes).

Spouse just screwed in the new bulb and reinstalled the light cover plate with the two screws. Took under a minute. Works great.

removed a dozen screws-discarded large cap-replaced diode-replaced a dozen screws(took longer to replace them than remove for some unknown reason). Microwave now works(wife happy).

I pondered getting both the inside and outside parts but went with the outside only. Prying the gasket loose went very easily, and removing the latches went easy too (to expose the bottom screw. I found the inner handle base broken but glued it together, not worrying too much because the real attchment to the door is done with the outer handle screws. I can see why the handle broke in the first place because the screws went in with a lot of torque necessary. I suspect that this weakened the posts so I lubricated the screws and backed them in and out so as not to stress the posts. I think all that is necessary is the outer handle, if you want to save some money. Everything snapped back into place easily and it is done after listening to the wife complain for almost 6 months. Part Select is a great site for appliance repair.

I received the door handle in 2 pieces along with one screw to put the two together. 3 days later the 2 screws to attach the handle to the microwave door showed up so I could finally put the handle on. I was amazed that I had to purchase each piece separately and that they pieces were shipped in two deliveries.

remove inner door frame,remove screws holding inner and outer handles reuse inner handle,replace outer handle as needed reinstall inner door frame.

My son took the door sealer off. It just pulls off easily. Then with screw driver took out the screws and put on the outer part of handle and replaced the screws and bracket. Took less than 30 minutes after we found how to do it.

removed screws from the old handle (this took the longest amount of time - 5 minutes, and required a needle nose pliers and a screw driver). Replacing the handle took 2 minutes to screw the handle to the door. Very easy!!

Unscrewed glass panel, removed old bulb, cleaned glass panel and installed new bulb. Screwed panel back into place.

Separated the inside panel on the microwave door, removed the screws from the old door handle and utilized them to install new door handle. Access to the screws was a little tight thus the "a bit difficult" rating.

Removed one screw lowered glass cover removed burned out bulb replaced with new one put glass back reinstalled screw. Dune 5 minutes back in business

Removed the door from the oven by lifting and unhooking from appliance.
With a small putty knife remove the snap-in ring from the inner door.This will expose the screws that hold the handle.
Replace then put everything back in reverse order.

Put in the new roller/guide

Open compartment, installed bulb, closed compartment