Question about Magic Chef MCO160UB Microwave Oven

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Where are the fuses in my microwave oven,?

Plug works but it's an old house and if we plug in the fry daddy and use the microwave at the same time it always throws the breaker, I know we need to plug the other appliance into a different circuit, but this time I believe it blew a fuse in the microwave itself because it has always worked again after we shut off the other, just need to know where the fuse or fuses are in the microwave itself ??

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  • Magic Chef Master
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Remember that micro wave ovens are fast cookers but power hungry items
do the maths and you will probably find that a fry daddy and a 1000 watt micro oven consume more power than the wiring will stand.
every time you throw the circuit breaker back on you create a power surge that is not good for micro oven boards.if if is still on when the switching is done.

Posted on Apr 26, 2015

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Inside behind the display panel on a small circuit board.

Posted on Apr 26, 2015

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SOURCE: microwave stopped working completely

Fan turned on after cooking because a thermostat got to hot and tripped turning on the fan to try to cool the unit.  The unit went completely dead when thermal fuse tripped which is located above the cavity on the left side.

Posted on Oct 31, 2007

MicrowaveSvc
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SOURCE: Replacing the fuse of a MCO160UW

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.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

There may 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.

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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1 Answer

Blowing breaker


In general house hold circuit breaker of the house is 15 Amps or 20 Amps.

Either you have defected (weak) circuit breaker and wiring or bad Microwave oven.

The 99.99 % house hold Microwave ovens pull less than 15 Amps. They may have internal ceramic 15A fuse or 15 Amp internal circuit breaker.

To isolate your problem:

1. Plug your Microwave oven to different areas (different electrical circuit) if the different circuit breaker still trips... your Microwave oven has a short - Most of them has a small ceramic fuse 15 amps fuse.-also check some inter lock switches at door .

2. If the Microwave oven works Ok then you may have:

2a. You may overload the existing electrical circuit, try to unplug some other appliances

2b. You may have bad electrical outlet receptacle (Replace it with the same type , - may need helps from licensed electrician)

2c. Weak or defect house hold circuit breaker. (Replace it with the same type , brand - may need helps from licensed electrician)


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Hamilton Beach hb-p90d23al-dj keeps blowing fuses


If the microwave oven is less than 7 years old the problem is in the magnetron, " the most expensive part " or the inverter board, either way costly adventure, good for target practice.

Aug 13, 2012 | Hamilton Beach Hb-P90d23al-Dj Microwave...

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Nothing works.I can't even get the display to come on. It's as if the darn thing isn't even plugged in! It was working fine and then it just went blank.We checked the house fuses and the...


After it was plugged, check the end of the wire for any voltage. If there is no voltage, cut the wires 3" away from the plug and replace the plug.

Sep 10, 2011 | Goldstar Microwave Ovens

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Kenmore elite model #665.61683101, has no power, plug works but microwave has no display, is there a fuse in this model?


There is a line fuse for this oven. Remove the cabinet and the fuse should be close to the line cord. Replacement fuses should be found at your local appliance supply house.

Apr 19, 2011 | Kenmore 62622 Microwave Oven

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Kenmore Model 721.66222500 just suddenly stopped working. No light, no power, no nothing.


I just had same problem happen on a Kenmore Model 721.89940490. I took off top panel and control panel. Behind control panel is a ceramic fuse. I pullud it out and checked with my mutimeter for continunity and it is blown. Since it is 20 years old I will get a new fuse and replace it. If it works good, if not I will have to go buy a new one to put under the cabinet. My contractor that built my house in 1994 directed wired it but I\'ll spend a little extra and put a plug in the cabinet, if I have to replace it. I suspect I won\'t but there is still that possibility.

Mar 17, 2011 | Kenmore 66222 Microwave Oven

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Just noticed microwave digital screen was blank and it will not work. checked plug. reset breaker. still not working. its only 5 yrs old


there are fuses inside the microwave but why did it blow??? normaly it only blows if there is a fault in the unit first

Aug 22, 2010 | GE Microwave Ovens

1 Answer

Microwave won't turn on. Seems like it is not getting power. I checked breaker. I am looking for a fuse. You know where one is? It is a GE Spacemaker(2 yrs old) model # JVM1440WH04


  • Make sure that the microwave is plugged into a grounded outlet. It must be a 3-prong outlet.
  • Make sure the clock is set.
  • Check to see if a programming sequence was entered. Sometimes improper programming or a program sequence such as delay start can cause the touch panel to be non-responsive. Unplug microwave or turn off house circuit breaker for 30 seconds. Plug back in, or reset circuit breaker, and try reprogramming unit.
  • Check the house circuit breaker or fuse box. If the microwave is DEAD and there is no display and nothing works- the problem could be a blown fuse or tripped breaker.

Jul 29, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Blows the powerstrip


Hello. I can help you. Let me review some info. about microwaves.

First of all, a microwave requires a lot of power. Most microwaves must have their own circuit to work well for a long time. Do not use any powerstrip or other extension cord, always plug a microwave directly into the wall.

The problems you are having are most likely due to your powerstrip than to your home wiring.

Plug your microwave directly into the wall and use it. If it works then discard the powerstrip as it is a fire hazard. get back and let me know how u make out.

May 27, 2009 | General Electric Microwave Oven

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