Question about Whirlpool MH3184XP Microwave Oven

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Where's the fuse?

Took off control panel per instructions on other posts, but still don't see fuse. Model MH3184XPT. Don't see it referenced on any of your diagrams.

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Yup, I had the same problem. The unit just stopped working. I gather that this is a common problem with this model. I followed other posts elsewhere, and found the fuse behind and near the top of the control panel. There's a white, cylindrical plastic thing about 1.5-in long in one of the wires that run down from the main fuse in the upper right corner. Pop open the case (you may have to cut a plastic tie around it). I replaced the fuse. My microwave is working now. We'll see how long it lasts.
It's hard to tell what kind of fuse it is, but reading elsewhere, it's a 250V 4A 5x20mm slow-blow fuse.  I haven't found a ceramic one just like came out, but a 4-pack of glass fuses that fit the specs are $3 at Radio Shack. PN 270-1066. (No endorsement implied, it's just where I found something that worked.)

No, the fuse in question (and there appears to be another like it lower behind the control panel) isn't on any of the diagrams or parts lists.

Posted on Apr 04, 2009

  • DKG8143 Jan 15, 2011

    My problem was solved by replacing the ceramic fuse on the upper right hand corner of the microwave above the control panel. I had to take off the grille on top of the microwave and take out a screw at the bottom of the screening in front of the fuse. The ceramic portion of the blown fuse was a brownish color because it was blown; new ones are white. I would imagine the coloration allows a technician to more easily see if the fuse it blown without taking things apart.

    I bought a four pack of the ceramic 250V 20A fuses for microwave ovens from Radio Shack for around $3 Model: 270-1041 (as mentioned above, no endorsement, just where I found them).

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