SOURCE: Maytag Microwave model MMV5165BAS. Doesn't heat
HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.
(((The fuse is located inside the unit along side the magnetron)))
SOURCE: Model mmv5165bas
If your full model number (from the tag in or on the unit) is MMV5165BAs, then you'll have to replace the entire door.
If your model is one of these, the handle is available separately, with part numbers below:
MMV5165BAB14 or MMV5165BAB15 black part number W10189508
MMV5165BAS14 or MMV5165BAS15 stainless part number W10187840
MMV5165BAW15 or MMV5165BAW16 white part number W10189509
Normally
you have to separate the door panels (as shown in the attached photo)
and then you'll see the screws you need to remove.
Or you can watch a YouTube video (not a video I made) here that demonstrates how it's done.
You can find handy exploded views and order parts by model number here.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer. 
SOURCE: Broken handle on maytag stainless
around the inner side of the door between the window and outer frame is a plastic shroud,by gentle prying it out using a flatblade screwdriver starting at the handle side working toward the hinge side it will pop off and the screws that hold the handle can be accessed and remove and replace the handle. to reinstall that shroud gentle push it in with your fingers
you can go to searspartsdirect and enter in your model number exactly as found in the mw cavity and order the part or perhaps look in your phone and find a appliance parts dist. in your area
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