Question about Microwave Ovens

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Unit was arcing. Checked owners manual and cleaned sensor panel as directed. Stopped arcing. Worked ok for a week. Went to use last night and control panel would light and seemed ok but oven would not turn on no matter what function was chosen. Removed sensor panel and noted burn mark at hte top in the middle.

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  • Microwave Ovens Master
  • 6,771 Answers

It is quite possible the magnetron has burned out, when it arcs it puts a tremendous strain and causes it to overheat very quickly. On top of that you found a burned mark behind the pad which is not good, so there are least two problems that must be addressed perhaps more. In any case it may be cheaper to replace the microwave oven at this point.

Posted on Mar 31, 2011

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Posted on Jan 02, 2017

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The little grey square of something on the right side of the oven got something stuck on it and it ignited. I cleaned off the grey thing and the oven has worked fine for weeks until somehing got stuck...


A "little grey square" may be a waveguide cover. If so, that is where the microwaves come into the cooking area of the unit. Those covers are sensitive to food splatter and moisture..Anything that gets on it will cook and burn and make a hole there. If not being careful when cleaning you can also make hole. If that is what the square is, the waveguide cover will need to be replaced and any arcing behind it or carbon despoisits from the arcing will have to be completely removed before running the unit again. The unit can be run without the cover for testing purposes it only stops food splatter from getting in to the microwave.Microwaves go right through it, l it i not a safety device to prevent leaking. Remove the cover and put a plastic container of water in the unit. Run it to test it. If it arcs, more thorough cleaning and removal of the burn marks is needed. If not replace the cover and you should be good. Only clean those covers with a DAMP cloth, or paper towel. Do NOT soak them or spray them too hard directly.

Aug 17, 2017 | CDA CM1 Microwave Oven

1 Answer

Model MH1150XM Cooktop light arced due to defective bulb. All power was lost in the microwave. I checked circuit breaker and power cord. Both were OK. Is there an internal fuse? If so, where and...


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Pardon the dashed lines, but FixYa's anti-spam settings make my Clarification Requests into a single blob of a paragraph otherwise, making them very hard to read.
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There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
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At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes: http://www.microweavedisplay.com
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If you don't find your mini-manual, or if you want to look at it before removing the controller, you can download it here:
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http://www.servicematters.com/docs/wiring/wiring_main.htm
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In many case, when the cooktop lights blow, or if they are removed or inserted without unplugging the oven first, damage to the control board can occur.
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We regularly repair such control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.
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Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.
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William E. Miller
prototech@usa.net
http://www.microwavedisplay.com
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Aug 25, 2009 | Whirlpool MH1150XMQ Microwave Oven

1 Answer

GE jvm187osf02 microwave loses power


It may be a blown fuse or the thermal cutout (T.C.O.) or thermostat on the magnetron or on top of the oven cavity.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

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At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

Accessing some components (especially the oven cavity thermostat) for testing and possible replacement will require you to remove the oven from the wall and take off the outer cover.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

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

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

Aug 19, 2009 | GE JVM1870 Microwave Oven

1 Answer

Microwave stopped working last night


If the microwave worked for a little while after you plugged it in again then it is just overheating.It is usually just dust/dirt collecting on the vents.the fan,and the magnetron(the thing the fan blows on).If cleaning all these doesn't solve the problem you may have a bad high temp overload sensor,and need to replace it.(this sensor is usually mounted directly on the top of the magnetron.The magnetron is the part that actually puts out the microwave signal.I've never seen a reset button.The high temp sensors reset themselves automatically.

Jun 23, 2009 | Panasonic NN-T654SF Microwave Oven

1 Answer

Jvm1190 over range micro/convection oven


If the hood vent exhaust fan came on by itself, that was due to excessive heat on stove top, a failure of the hood TCO (thermal cutout / thermostat) or a problem on the control circuit board (smart board) which we regularly repair for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

d:%5cele%5crepair%5cmicrowave%5cge_hotpoint%5cmini_manual_behind_grille_small.jpgdee77f7.jpg

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

In this model, there are three TCOs which could be open, rendering the oven dead: The bottom TCO (not to be confused with the hood TCO, which should be normally open) the heater TCO and the magnetron TCO.

Also, the fuse should be checked in the unit.

Accessing some components for testing and possible replacement will require you to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

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

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

After you look into this, if you still need help, please write back with more details.

Feel free to contact me directly (and please remind me of your full model number) for more information & help or see our Web site.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. "Ed" Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Feb 15, 2009 | GE JVM1790 Convection / Microwave Oven

1 Answer

My mother's GE microwave oven has a large burn mark on the ceiling of the unit. She noticed some plastic parts on the floor of the unit. She bought the combination microwave-stove about four years ago and...


That would be the stirrer assembly. It consists of the stirrer motor, stirrer blade, and stirrer cover.

Without the stirrer in place, the oven will not cook evenly and may arc and spark.

Without the cover in place, food particles and grease can get on the waveguide and magnetron, and cause arcing damage.

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

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

If you need to replace the stirrer motor, you'll probably have to pull the oven from the wall. You can download GE owner's manuals and installation instructions here.

If the cavity metal of the oven is chipped or charred, it will have to be sanded smooth and clean and dried thoroughly.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Dec 02, 2008 | Microwave Ovens

1 Answer

GE Spacemaker XL14, night lights won't work


We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid in about a week.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

This can often also affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on too.

Details of our service and critical safety information and disassembly information is at our site, and our link is at our listing here on FixYa.


Feel free to contact me directly (and please remind me of your full model number) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Nov 29, 2008 | GE Microwave Ovens

1 Answer

Goldstar


We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com


Nov 27, 2008 | Microwave Ovens

1 Answer

Microwave stopped working for no reason


A microwave can be dead for many reasons.

It may be the fuse, which is usually located behind the grille or 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 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.

At our site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

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

There should also be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

If you don't find your tech sheet, you can download it here.

If the cavity thermostat needs to be checked or replaced you'll need to pull the oven from the wall.

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

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Nov 21, 2008 | Whirlpool MH1140XM Microwave Oven

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