Whirlpool MH1150XMB We just had one installed and the turntable does not turn, no manual came with it ( we live in an apartment)

There is no turntable control. It is always on. The turntable should change direction each time the unit is used. If the turntable is not operating, it has malfunctioned. Newer microwaves for the most part all have full-time turntables to promote even heating, thus reducing customer complaints about ovens that don't heat right.

Part description and diagram is here: http://www.appliancepartspros.com/whirlpool-fuse-thrml-w10138793-ap4308182.html

Unable to find a service manual, but here is a link to other documents:https://www.helpowl.com/manuals/Whirlpool/MH1150XMB/133577

I can only give dimension in inches.
Width is 29 15/16 Height is16 1/4 Depth is 15 3/8

It's important that high-current devices like microwaves be on their own dedicated breaker.

I would suspect the 20A fuse and then the oven cavity thermostats, in that order.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

Accessing some components (such as the oven cavity thermostat) for testing and possible replacement will require you to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download Whirlpool owner's manuals and installation instructions here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid with a one year guarantee.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

This can often also affect the exhaust fan, cooling fan, turntable, and/or inside light operation, too, and on these models, can prevent them from starting or running.

Details of our service are at our Web site, along with a video showing how to remove a typical over the range control panel assembly in under 5 minutes.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
[email protected]
http://www.microwavedisplay.com

Normally, no. That protects the metal mesh which blocks microwave energy from getting out the door.

Check your owner's manual.

If you do need to replace that clear cover, or any other door parts, etc., you can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

you'll have to buy a new control pad, or if you can solder you may take display out and see if the connections are broke to those buttons and solder them back.

If the housing of the unit isn't too difficult to remove (normally 3-5 Phillips screws around the rear edge), with the unit unplugged of course, check for a user replaceable fuse inside. The magnetron is separately fused and fuses can fail due to metal fatigue. It will be high amperage; 10-20 amperes and many hardware stores will have them. BTW, there is no residual radiation from a magnetron that isn't operating.

there is a motor under the turn table that spins that tray.now some more expensive units would allow you to turn off the turn table if user wanted to,so check that out .but if not and its under warenty call a sears or any servicer that repairs you brand under warenty

First you should be sure the ventilation is correct through the oven.

If you don't feel air through the vents when it's running, that needs to be addressed.

Also, it's important to wipe off the interior surfaces whenever moisture seems to be accumulating.

Also, it's recommended to leave the door open a few minutes after cooking to allow it to dry.

Please feel free to contact me directly if you need more help.

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
[email protected]
http://www.microwavedisplay.com