Question about Microwave Ovens

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Oven on convection for 45 minutes sort of thud then went dead no lights nothing, fuse is ok came back to it 3hrs later and is working again?

Thought maybe an overheating problem but had only been working on convection foe 45mins. no more than is used ordinarily

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  • Microwave Ovens Master
  • 9,047 Answers

That is usually an overheating problem. It may be due to blocked air flow, a slow convection fan, or a failing convection thermostat / TCO.

Posted on Jan 09, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: 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

Posted on Feb 15, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: Sharp R-1450 Microwave Oven

The most common suspect here is a shorted high voltage capacitor, since you say it blew the fuse right after Start, but I would certainly suggest checking the door switches and door switch mounts first. Just be sure you installed the right fuse. It would be a The switch mounts seem to break at about this point in the life of these models. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your model number here: http://www3.sears.com (the three is correct)

Posted on Jun 08, 2007

SOURCE: JMV8208 BAW Model 30" Jenn-Air Convection/Micro combo

have a good look at front to see reset??.press it once it comes back on unplug from the wall and & open it up and go to the part and give it a good clean with wd40, check the push pad for ware & tare dirt gathers and builds up

Posted on Apr 24, 2009

  • 119 Answers

SOURCE: No power to Panasonic NN-S252 microwave oven

follow the incoming mains lead into the microwave their is a small pcb with a fuse their check this first

Posted on Feb 20, 2010

  • 1 Answer

SOURCE: GE JVM231WV001 Stopped Working

replecae the capasiter

Posted on May 12, 2010

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1 Answer

Gh9115xe went off completely sometime after a cup of coffee was reheated. Now, nothing works. The outlet is live.


probably not
there is a glass fuse under the outer case near the circuit board
if that is blown it is from a short so you may have to take it in for a diagnosis

Apr 28, 2017 | Whirlpool GH9115XEB / Q 850 Watts...

1 Answer

I believe mine blew a fuse as well


Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it.
many people have been electrocuted with an unplugged microwave due to the enormous residual charge inside.

you can now get a new microwave at walmart for fifty bucks..........why monkey with a ten year old unit.

Aug 17, 2009 | Sharp R-963 Convection/Microwave Oven

1 Answer

Microwave was run with nothing in it


Well sorry to break it too you, but the oven has been compromised. DO NOT USE! It doesn't turn on because the safety features have worked properly and have saved your home from severe damage. Lesson learned. /shrug

Jun 12, 2009 | Sharp R-930AK Convection/Microwave Oven

1 Answer

JMV8208 BAW Model 30" Jenn-Air Convection/Micro combo


have a good look at front to see reset??.press it once it comes back on unplug from the wall and & open it up and go to the part and give it a good clean with wd40, check the push pad for ware & tare dirt gathers and builds up

Mar 09, 2009 | Jenn-Air JMV8208A Microwave Oven

1 Answer

Bought a brand new whirlpool microwave/convection oven 2 months ago. Model GH7208XRS-1. Was using it to reheat food for 2 minutes. Food was not hot enough, so put it in for 1 more minute. When I closed the...


The first thing to try is a "hard reset". Unplug it from the power line for a minute, plug it back in, set the clock, then try again.

If it's still dead, since it's under warranty I would contact Whirlpool customer service for a free fix.

We're happy to help and we appreciate your thoughtful rating of our answer.

Jun 12, 2008 | Whirlpool Microwave Ovens

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Repair an Amana microwave


My amana micro just went dead. No lights nothing ,almost like a fuse blew.Its an over the stove model . The outlet works fine.#mvh210w

Dec 21, 2007 | Amana AMC6158B 1000 Watts Convection /...

1 Answer

GE Over the Range Microwave/Convection won't start


So it's dead - that is to say no display, no lights, and no response from the keypad?

A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the thermostat to open. When it cools, it closes the circuit and allows power through again.

If the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Please write back with more details if you need further help.

We appreciate your thoughtful rating of our answer.

Nov 25, 2007 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Will not work


A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the thermostat to open. When it cools, it closes the circuit and allows power through again.

If it's intermittent or random, it may be a bad connection, usually on the control board or fuse holder.

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 the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Please write back with more details if you need further help.

We appreciate your thoughtful rating of our answer.

Nov 22, 2007 | Sharp R-1850A Convection/Microwave Oven

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