Question about Maytag MMV4205 Microwave Oven

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Wireing Diagram Replaced magnatron. Can you email a wireing diagram to aid in checking circuits?

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There should be one tucked away behind the control panel.

If you don't find it, feel free to reply here or to me directly via my site (see below) and I can e-mail it to you.

If you tell me what your symptoms are, I can probably help you figure it out.

You'll find a link to our site in our listing here on FixYa: http://tinyurl.com/yzjozk

Posted on Mar 10, 2008

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Built in microwave counter top lights not working


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Can I have a wireing diagram and is there one you can supply?


SORRY we do not know the MAKE of it so we can not begin to assist

Sep 23, 2015 | Microwave Ovens

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What do i do if my Hamilton beach microwave will not heat anything!!


Most of the time if the unit won't hest anything, the problem.is the power diode.

If you are familiar with working with very high voltage, open the unit, carefully discharge the power capacito using an insulated screwdriver.

Now look for any loose wiring. Reattach any loose wires to their contacts.Check and replace any blown fuses with identical ones.

Now, locate the piwer diode in the high voltage circuit and test it for function. This diode is often the only problem. I have repaired many microwaves by only replacing this diode.

If everything checks out so far, read the schematic and test the large step-up transformer. Afterwards, check the circuitry containing the magnatron.

Except for the transformer and the magnatron, the unit will be worth repairing. If the transformer or magnatron is the problem, the cost of the replacement parts is higher than a new unit.....unless you happen to have the right working part lying around.

Hope this helps. But remember, ALWAYS discharge the high-voltage-capacitor.....the charge is enough to hurt you SEVERLY!

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Your thermal fuse is probably bad and must be replaced.
Copy and paste this link for the fuse located in the control panel.
http://www.appliancepartspros.com/part_details.aspx?part_id=3115186

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1 Answer

How do i replace the magnatron on a kitchen aid khms147kss


You would need to remove it from the wall, using the installation instructions here, review the safety information here, then remove the outer cover and discharge the high voltage capacitor.

Then you can swap the magnetron.
You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.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

Microwave is plugged in, but getting no power, circuit ok, cannot find a fuse on the microwave.


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jenfou@teikomsa.net

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Found a "schematic " diagram of electrical lay out and repaired the associated problem of being mis wired.

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GE spacemaker xl1800 and Pop tarts bad mix


it sound to me as if the high voltage diode is shorted. It could be inside the capacitor or out board the cap. The capactor could also be short but this is a rarity. Diodes are a cheep item . repace it and if it don't work its probably the magnatro. good luck.

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This doesn't have the diagram hidden away somewhere inside? Check at the bottom edge of the control panel, transformer brack, or rear of the oven. Otherwise, you can find wiring diagrams of earlier models that may be close enough. Just enter your model number here: http://tinyurl.com/gv383

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