I will like to know, the minimal distance from the bottom of the Maytag stainless steel micro wave oven to the top of the maytag electrical electrical stove

It is strange as the inside of micro wave ovens are usually stainless steel. Clean off the rust, you may find it is not rust at all. If it is rust it will be problem because it means that eventually dangerous radiation will be able to escape from the oven. But clean it first and inspect if there has been any corrosion of the material under the rust.

That sounds like a wave guide cover that protects food splatter from getting into wave guide. will need to replace that cover and thoroughly clean inside of unit ans around cover. Those covers must be kept clean and dry!!!

Take this link to Maytag and select your requested owners manual.
http://shared.whirlpoolcorp.com/product_literature/search_results.jsp?searchTerm=MES5875BAS&siteCd=MT_EN_US&userType=Consumer

you vent fan motor may be trying to vent upwards instead of towards tthe front of the unit, you may need to rotate motor

my micro wave it doesn't heat?

probably a failed turntable motor, check for power at motor

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.

MOST OF THEM YOU CAN TAKE THE SCREWS LOOSE FROMTHE TOP OF THE CABINET OVER THE STOVE, YOU NEED TO PPL, REMOVE TOP SCREWS HOLD IT AN TILT IT AN THEN PULL IT AWAY FROM THE WALL, MOST WALLL BRACKETS HAVE A HOOK THAT THE MICRO MOUNTS TOO IT 90%OF THE WEIGHT IS BEEN HELD BY THE WALL. GOOD LUCK LEAVE SOME FEEDBACK.!

I'm not sure about some of those appliances but ApplianceArt.com maybe able to help you. They sell stainless panels as well as the Softmetal adhesive stainless that's been on HGTV's "I Want that," "Design on a Dime," and "Real Estate Intervention." And I think some others.

This doesn't have the diagram hidden away somewhere inside? Check at the bottom edge of the control panel, transformer brack, or rear of the oven. Otherwise, you can find wiring diagrams of earlier models that may be close enough. Just enter your model number here: http://tinyurl.com/gv383