Question about Maytag Microwave Ovens

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Ran the microwave with nothing inside. Now microwave is not working.

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When you say it's not working do you mean it is completely dead??? or it turns on but it don't heat??
When running an empty microwave it can damage the MAGNETRON because the inside coating of the microwave is design to bounce (reflect) the waves to whatever is sitting in the bottom/middle (food)... if nothing is there to ABSORB the waves, than it bounces back into the MAGNETRON and can damage it (if it runs long enough)... the magnetron is generally more expensive to replace than the oven it self... so to make sure if the magnetron is working, you could try a test with a HENE lamp (small orange neon bulb) in a glass of water, put the bulb in a full glass of water than put the glass in the oven, start the oven, if you see the bulb glowing orange (lights up) it means that the MAGNETRON is working, if not than you need a new oven...

Good luck!

Posted on Mar 21, 2011

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Why can't you run a microwave without anything in it? What happens and can you fix the problem? I forgot to put the food in and ran it for 4 minutes with nothing inside. Now it won't heat any food.


A microwave oven works on the principal of a high power high frequency radio transmitter. The device that emits the microwave energy is a tube called a magnetron . When you run the microwave empty with nothing to absorb the microwave energy it is all reflected back to the magnetron causing it to overheat and destroy itself or cause failure in the High Voltage power supply due to excessive current draw.This is caused by standing waves.

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Microwaves have an inline fuse inside that fatigues over time.Take the cover off,follow the power cord after it enters the housing to locate the fuse.

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1 Answer

My son ran the microwave with nothing in it. nothing works. is it ruined?


Magnetron used with no load.

It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it. Using the microwave with nowhere for the energy to go results in magnetron meltdown!
Contact an appliance repair service for a repair.

Feb 21, 2011 | Maytag MMV4205 Microwave Oven

1 Answer

Don't wok at all not even the clock


well not a smart thing to do realy,,,,,it burns out the magnatron,,,,,trying to heat up a box of nothing?
you may well find its going to be a lot cheeper buying a new unit than trying to get yours fixed up,,
please dont go poking about inside this mocrowave it can still kill you as there is likley to be 1000 of volts still in it,,,they kill out right too, be warned,,,,,

Jun 05, 2010 | Maytag MMV4205 Microwave Oven

2 Answers

Unit is dead after accidentally running it empty.


If you ran it for that long with nothing inside, there is a good chance it self cooked.

It can probably be repaired. The economics of the repair is something you will have to judge for yourself.

To assist you, may i suggest you visit www.repairclinic.com and check on some major parts for your make and model. If the parts = more than 25% of replacement, I think id be moving on. Expect to pay a pro at least $100.00/hr labor. You should NOT do it unless you are skilled at handling delicate and lethal electronics. A microwave can kill. Another thing, after you fix it, you have a lot of $ invested and still have a old machine that ran for 13 + minutes empty.

Oct 13, 2009 | Microwave Ovens

2 Answers

Microwave was ran for 5 minutes with nothin in it now no display


most have an internal fuse check it first if that is not it check the thermal fuse both parts run 10-15 dollars

Jun 30, 2009 | Maytag MMV4205 Microwave Oven

1 Answer

No Power


HI, there is a inline fuse located inside the microwave ion the power supply board. check for continuity. replace the fuse if necessary. if the fuse is OK, replace the power supply board.

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1 Answer

Panasonic nn-s558ba microwave won't power on


Lee,

Have Landlord replace unit after verifying that outlet has power.

In the future, follow manufacturer's cleaning instructions and DO NOT
run microwave without something in it (even a microwave safe cup of water).

Larry Hanson EH&S Specialist

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1 Answer

Microwave doesn't work


The magnetron is dead. it can be replaced if you do it it is cheap if you call a repair guy its cheaper to get a new one.. parts roughly areound $100

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