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It started blowing fuses 5 ampfor no apparent reason.First problem I have had in 30 years.Sometimes straight away sometimes after a few minutes.

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  • In Master
  • 44,327 Answers

30 years good lord retire it .it doesn't owe you anything

Posted on Aug 11, 2015

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave blows fuse

The most common suspects are the high voltage transformer and the magnetron. It's also possible you have a flaky door switch or loose door switch mount. 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://tinyurl.com/gv383

Posted on Jun 08, 2007

reg501
  • 413 Answers

SOURCE: fan coming on for no apparent reason

The pushbutton panel is most likely failing, part cost around $60.00 if you want to replace yourself. (It's not that difficult). I'm not sure why, but this type of pushbutton panel (referred to as membrane switches) have been experiencing a high failure rate over the past couple of years. Symptoms include buttons not working at all, intermittent beeping sounds, turning on by themselves etc.

If you need further assistance, let me know
Regards,
reg501

Posted on Jul 08, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: Panasonic NE1856 microwave. Located in

It may be a failing high voltage transformer, or some models have a voltage selector on the back, and if it's not set to match the measured line voltage level at the outlet, that can cause fuse blows.

The service manual for this UK model is available for purchase / download online. You can check these Google search results.

(NOTE: Those links are not mine and I do not have this manual for sale. If I had it, I would offer it to you at no charge)

If you decide to buy the service manual and will send me at least the schematic page, I can probably tell you what's wrong or what I most strongly suspect after seeing the overall circuit.

Feel free to contact me directly 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

Posted on Sep 25, 2008

SOURCE: Microwave blowing house fuse, but not right away.

PLEASE DO NOT USE OR TOUCH when plugged in. Remove Fuse & UNPLUG IT. The ONLY reason a Fuse "Blows" is due to an Active, to Earth fault. This "Could" place the "Mains" voltage on the "Case" of the Unit, if touched while plugged in it could KILL YOU. Please call a registered professional, to attend to this. It may be in the Unit?, it may be in the wiring?

Posted on Feb 10, 2010

  • 98 Answers

SOURCE: I have a GE SpaceSaver 900W over the range

well, that is a poor quality microwave... invest in a tumbles 1000 microwave!!!

Posted on Nov 29, 2010

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1 Answer

Everything still functions properly on whirlpool microwave model number KCMS185J88 - 3 but it won't actually heat. What may be the problem?


There are usually two separate circuits, one for the magnetron(which does the heating), and one for other functions like fan, light, or turntable. A number of things can cause just the heating to quit. The magnetron circuit has a fuse and it can blow, sometimes for no apparent reason, and sometimes because there is a serious short, such as a shorted hi-voltage diode or failed capacitor. This circuit also has some safety interlock switches that stop the magnetron if they don't function properly for some reason. Because of the dangerous high Voltages associated with these devices, I recommend you take it to a qualified technician. The problems I described, are often not difficult to diagnose by a tech, and frequently, the parts are not costly either. I would take it directly to a tech at a shop to avoid an expensive house call. That way, if it is diagnosed as an expensive repair, you can opt out and cut your losses right there. Or you may get lucky and pay a small labor charge and another small amount for a part.

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Works a few seconds then the fuse blows. model#JES13845F


Fuse holders sometimes become weak due to heating. If the fuse is not held very tightly by the holder, the fuse will blow because it gets hot, not because the current exceeds the fuse's rating. If this is the case, replacing the fuse holder would be in order. This is not to be confused with the situation where the fuse blows when the door is opened or closed. In that case it's a door switch sequencing issue, or a bad switch.

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New unit used 3 days. Microwave beeps and screen goes to menu, or set time screen. Sometimes changes the date all by itself. Does this in the middle of the night all night long.


I advice you to contact service if it has guarantee. This seems to be a psychological problem about your oven(!). Technical person need to do an electronic research surgery on its board to see if there is any wrong thing.

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1 Answer

Control panel has no power and breaker is not tripped


The main fuse in the microwave oven has blown, this is a ceramic type with a white body and silver ends located near the high voltage capacitor. Sometimes the fuse will blow after few years, but generally it is caused by a defective door switch.

Apr 10, 2011 | Microwave Ovens

1 Answer

My washing machine is causing the electricity to short when we put it on. Sometimes it runs for a few minutes and then it happens and sometimes it happens straight away. I did have to have a tube...


Water contamination on the electrical terminals will cause the washer to "Earth Out" and take out the RCD Household safety trip.
See where the contamination is and replace the contaminated items.
Hope that fixes your problem.

Dec 13, 2010 | Microwave Ovens

1 Answer

Microwave blowing house fuse, but not right away. Sometimes not, sometimes within 15 seconds, sometimes longer. Any idea what the problem and how to fix? Thanks


PLEASE DO NOT USE OR TOUCH when plugged in. Remove Fuse & UNPLUG IT. The ONLY reason a Fuse "Blows" is due to an Active, to Earth fault. This "Could" place the "Mains" voltage on the "Case" of the Unit, if touched while plugged in it could KILL YOU. Please call a registered professional, to attend to this. It may be in the Unit?, it may be in the wiring?

Feb 10, 2010 | Microwave Ovens

1 Answer

GE spacemaker Power goes off and clock needs resetting


Try going to the breaker box and shutting off the power to the microwave for 10 minutes. After 10 minutes, turn back on and set the clock. This fixed my clock and turntable both. Apparently turning off the power resets the software in the clock.

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1 Answer

Jenn-Air M170 Microwave Died


I would suspect the fuse has blown, probably due to either a loose fuse holder or a shorted high voltage capacitor.

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.

The fuse is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.

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.

It will be a ceramic fuse, probably 20 amps. These can be had in most grocery stores, hardware stores, home improvement centers, and big box or department stores.

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.

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

If yours is blown, I would buy two or three fuses, just to be safe, because you may find that it blows again right away or shortly after hitting Start.

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.

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

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

Dec 03, 2008 | Microwave Ovens

1 Answer

Fan coming on for no apparent reason


The pushbutton panel is most likely failing, part cost around $60.00 if you want to replace yourself. (It's not that difficult). I'm not sure why, but this type of pushbutton panel (referred to as membrane switches) have been experiencing a high failure rate over the past couple of years. Symptoms include buttons not working at all, intermittent beeping sounds, turning on by themselves etc.

If you need further assistance, let me know
Regards,
reg501

Jul 07, 2008 | Kenmore 63792 Microwave Oven

1 Answer

Deawoo model wm1310pm blowing fuses


It's important that the door switches are clean, solidly mounted and operating smoothly. Sometimes as a switch ages, goes bad, or gets clogged with grease, it can be "laggy", and can allow a short that can blow the fuse and/or breaker. They can certainly be intermittent. Since it's blowing the breaker too, that usually indicates door switch trouble, so the door switch mount may be loose or broken. Beyond that, there is a chance that your magnetron or high voltage transformer is going bad, but I strongly suspect a door switch, mount, bent door, etc. first. 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

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