Question about Whirlpool MH1140XM Microwave Oven
I have a whirlpool microwave oven that just simply stopped working a week ago. The model number is below
MH1140XM 900 Watts Microwave Oven
A microwave can be dead for many reasons.
It may be the fuse, which is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.
If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.
If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
At our site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
There should also 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.
If you don't find your tech sheet, you can download it here.
If the cavity thermostat needs to be checked or replaced you'll need to pull the oven from the wall.
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.
Posted on Nov 23, 2008
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Posted on Jan 02, 2017
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