Question about Sharp R-1880LS 850 Watts Microwave Oven

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Unit dead Unit is dead - suspect blown fuse

THe unit went dead after blowing a breaker due to overload conditions. I think the fuse may have blown inside the unit. Where is the fuse and how do I get to it?

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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.

The reason for this is that if you do not have any experience and training with microwaves, you can get a SEVERE shock, even if the oven is unplugged. THAT being said, if you still want to know where the fuse is get back to me. good luck.

ALSO, as you may know, a small microwave these days is under fifty bucks at walmart.

Posted on May 20, 2009

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Posted on Jan 02, 2017

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Microwave just stopped working while in the middle of cooking. clock and inside light went black - nothing works!


You could have over heated the microwave or blown a fuse due to a problem in the door circuit. Either way this can be repaired with minimal parts. I would suspect you blow the fuse to the cabinet due to temperature where to high in the unit. I would need a model number to assist you further..
Good Luck

Aug 03, 2011 | Kenmore Microwave Ovens

1 Answer

Machine will not turn on


from online Microwave Repair Manual: Totally dead oven (no lights, no clock, no display, no fan, no heat...)First, check power to the outlet using a lamp or radio you know works. The fuse or circuit breaker at your service panel may have blown/tripped due to an overload or fault in the microwave oven or some other appliance. You may just have too many appliances plugged into this circuit - microwave ovens are high current appliances and should be on a dedicated circuit if possible. If you attempt to run a heating appliance like a toaster or fryer at the same time, you *will* blow the fuse or trip the circuit breaker. A refrigerator should never be plugged into the same circuit for this reason as well - you really don't want it to be without power because of your popcorn!

If you find the fuse blown or circuit breaker tripped, unplug everything from the circuit to which the microwave is connected (keep in mind that other outlets may be fed from the same circuit). Replace the fuse or reset the circuit breaker. If the same thing happens again, you have a problem with the outlet or other wiring on the same branch circuit. If plugging in the microwave causes the fuse to blow or circuit breaker to trip immediately, there is a short circuit in the power cord or elsewhere.

The microwave oven may be powered from a GFCI outlet or downstream of one and the GFCI may have tripped. (Removing a broken oven lamp has been known to happen.) The GFCI outlet may not be in an obvious location but first check the countertop outlets. The tripped GFCI could be in the garage or almost anywhere else! Pushing the RESET button may be all that's needed.

Next, try to set the clock. With some ovens the screen will be totally blank following a power outage - there may be nothing wrong with it. Furthermore, some ovens will not allow you perform any cooking related actions until the clock is set to a valid time.

Assuming these are not your problems, a fuse has probably blown although a dead controller is a possibility.


While you can do some repairs on your microwave, what you don't know can kill you... even on an unplugged microwave, so make sure you understand the dangers and how to reduce them before you try anything inside a microwave. If you want to do more yourself, go to the link at the top of this post.

Oct 21, 2010 | Microwave Ovens

1 Answer

Internal ceramic fuse repeatly blown.


If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead several 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. See: http://www.microwavedisplay.com/doorsw.txt in this case.

If this unit has an inverter some parts are difficult for the average do it yourselfer to replace, such as parts which are spot welded, not using removable connectors.

In such cases, it's best to replace the entire inverter.

Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on them.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

You can find an authorized Panasonic servicer here.

You can order Panasonic parts from
Encompass or by calling 866-779-5835.

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

Jan 09, 2010 | Panasonic Microwave Ovens

1 Answer

My niece cooked something that was supposed to be in for 4 min, 40 min and then the oven went completely dead, no power at all, no lights. The breaker is fine. What do you think it is?


These can have thermal fuses inside and if it was very steamy and hot it may have blown. There are also internal fuses in the micro but these are dangerous to work inside if you do not know what not to touch.
Eric

Jun 20, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Dead microwave


There are replacable fuses inside. Taking the microwave apart requires removal of a lot of screws and the cover that can be rather bulky. make sure it's unplugged and safe before you begin. you can get replacement fuses at radio shack, ect. be sure to buy the same type and amperage. if the blow a second time there may be other issues.

May 27, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

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

Blown fuses


I service a lot of commercial units.

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.

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 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 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 when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.

Please feel free to contact me directly if you need more help. If you can scan and e-mail the mini-manual, that would help me help you, too.

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

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

Apr 21, 2008 | Amana HDC21 Microwave Oven

1 Answer

Blown Fuse


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 when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

Apr 01, 2008 | Emerson MW8775W Microwave Oven

1 Answer

I think I broke my baby...


If it's dead, it's probably a blown fuse or maybe a blown thermalcouple fuse. a bad magnatron won't make the unit apear dead unless its blowing fuses.

Hope that helps..

Geno

Mar 24, 2008 | GE JES1142SF Microwave Oven

1 Answer

Service to Whirlppol MH7130xez-1, circuit breaker popped then unit went dead


water may have leaked inside unit causing a short.the transformer output is about 1400 volts that feeds a large capacitor. a direct short can blow the transformer instantly or any support parts without time to burn something. creating little or no smell. I never sujest that a person
to try to repair a microwave oven because
the capacitor can still be charged and very lethal.

Feb 25, 2008 | Whirlpool MH7135XE Microwave Oven

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