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MODEL R-8476 FUSE BLOWS WHEN SWITCHED ON

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You may need to find a service person to check this for you, but it sounds like you may have a micro-switch for the door that has gone bad. I have run into this a few times and found that to be the cause. What happens is the bad switch causes a direct short when you turn it on and that blows the fuse to protect the rest of the microwave. Hope this helps.

Posted on Mar 25, 2014

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Works a few seconds then the fuse blows. model#JES13845F


Fuse holders sometimes become weak due to heating. If the fuse is not held very tightly by the holder, the fuse will blow because it gets hot, not because the current exceeds the fuse's rating. If this is the case, replacing the fuse holder would be in order. This is not to be confused with the situation where the fuse blows when the door is opened or closed. In that case it's a door switch sequencing issue, or a bad switch.

May 04, 2014 | Microwave Ovens

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My Whirlpool microwave MT6120XEB-0 keeps blowing the fuse. Inststalled new fuse and display and timer works. Cooking blows new fuse. It turns on, makes grinding sound and blows a new fuse within a second...


You almost certainly have a shorted high voltage capacitor.

See the safety warnings and help information here.

Chances are you will have to remove the oven from the wall to replace it.

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


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

Oct 26, 2013 | Microwave Ovens

1 Answer

Whirlpool microwave fuse has blown multiple times


It depends on which fuse and when it blows. Wish you had mentioned that.

But usually it's a defective door switch or door switch mount.

If the fuse blows at random times while it's cooking, it may just be a loose fuse holder. Those have to be replaced due to metal fatigue, not just squeezed tight with pliers.

If it blows as soon as you hit "Start" to begin cooking, you have a shorting high voltage capacitor.

If it blows when you open or close the door, you have a loose or defective door switch or latch.

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.

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1 Answer

On model mh1160xss-0 whirlpooll microwave the fuse blows everytime you turn on cook


The magnetron is shorted or the inverter board is defective if microwave is 7 years old or less.

May 16, 2012 | Microwave Ovens

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Whirlpool 3hler5437jq1 dryer blows fuse


that would be a shorted or "bridged" heating element .. thats replaceable by a repairman or someone familiar with electrical things ..

here is where you can order parts and instructions for your dryer
http://3hler5437jq0.theappliancepartswarehouse.com/

here is where you can purchase a service manual if you need more information .. ($10) ...
http://www.manuals-in-pdf.com/index.php?main_page=advanced_search_result&keyword=3hler5437jq1&forward=plist

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replace the fuse see if it blows again you can get those at radio shack 250 volt either 15 or 20 amp get 3 or 4 of em

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Fuse breaks when microwave is switched on


you will probably find that the fuse blowing is due to door switch adjustments, most unit have 3 switches 2 on the door catches and one that is crowbar protection. the 2 door catch switches are normally closed with the door open and the crowbar is the opposite. if they do not change at the correct time when closing nthe door the fuse blows

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1.Problem with monitor door switch or
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If the fuse blows as soon as you hit START, then it's likely that you have a shorted high-voltage capacitor. If the fuse blows a few seconds after you hit START, then it's likely that you have an overheating / shorting high-voltage transformer. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your model number here: http://tinyurl.com/gv383

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