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Blown fuse on Roper over stove microwave Model #MHE14XMQ-0. Need diagram showing where this fuse is located and how to change out

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  • lazer20022 Aug 27, 2008

    My whirlpool mh1140xm microwave/light and vent stopped working. I removed the grease filters to clean them, As I was putting them back, there was a 'blow sound' and the microwave is not working. What could have happened? How can I fix it?

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  • Whirlpool Master
  • 8,820 Answers

We have critical safety & disassembly info (including a how-to video) at our site, linked here.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

A microwave can be dead for many reasons.

It may be the fuse, which is usually located 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 goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

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.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

Please reply back here if you still need help.

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

Posted on Jul 19, 2008

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SOURCE: Blown fuse on Roper over

Go to this link for the complete detail about your microwave and also for the diagram and how to replace the fuse..
https://secured.whirlpool.com/Service/SrvTechAdm.nsf/0/52015b2c875fae4d85256a8c0062547e/$FILE/4322167.pdf

Hope that helps..........

Posted on Jul 28, 2008

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