Question about Microwave Ovens

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My back and decker infrawave oven no power. electrical outlet is ok.

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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 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 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 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.

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 it has a hood thermostat, that should read open, as opposed to the others, which should read closed.

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: http://tinyurl.com/yzjozk

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

Posted on Apr 23, 2008

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There could be a connection problem in the electrical outlet the microwave is plugged into or anywhere in that circuit all the way back to your electric breaker panel. It sounds like the microwave is losing power and resetting. WARNING: Any type of electrical work should only be completed by persons qualified to do so.

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According to your problem first check all electric input of the oven check the power cord and ac outlet also. Reset the Oven. Reset the program properly. Check the fan of the oven. If all are ok then open the oven and check the wiring of the oven portion. May be there is any problem in wiring or circuit. Call any nearest technician.

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I have a sharp carousel over the range microwave oven R-1505LK no power the outlet is ok did lose power to the house and the microwave didnt come back on where is the fuse located


Hi,

The fuse is usually located inside the cover near where the power cord enters...


Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Nov 16, 2010 | Sharp R-1505 Microwave Oven

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The microwave does not react what so ever. Checked the fuse and its fine, what could be the problem? please help


Is there power at the outlet? You say you checked the fuse ... is that the one inside the machine? Is the outlet protected by a GFI (reset for a GFI is on the GFI)? A GFI looks like a ordinary outlet but is very sensitive to electrical irregularities. Your circuit breaker may be on or your power panel fuse may be fine and the fuse inside your oven may be fine. If the GFI is popped, you have no power.

Try some other electrical device in the outlet. Does it work? Try an extension cord from a known hot outlet?

Beyond these tips, you may need professional help with this.

Thanks for your interest in FixYa.com

Jan 22, 2010 | LG LMV1630ST Microwave Oven

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No power to microwave all ready checked fuse box and ok , changed microwave fuse ,and still no power and solutions it a whirlpool


the circuitry has probably gone bad, try plugging it into a different electrical outlet, but if that doesnt work, its probably dead. and it will be cheaper for you to replace than have serviced, unless its still under a warranty

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We had an power outage and lost power for a few hours everything came back on but the microwave. I checked the outlet and checked the fuse still nothing. Is there anything that can be fixed?


Hello if you have no power at the outlet, you may have saved your microwave. If the outlet is dead go to your house electrical panel and reset the breaker or replace the fuse. if the outlet is live and the microwave still won't power on you will have to choose between repair and replacement. Definitely get an estimate before agreeing to a repair as microwaves are very inexpensive today compared to even a couple of years ago.

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Has power to unit but nothing works, ie. oven, clock, timers, etc


If you don't see any light in the display or from the light bulb inside it you probably need to replace the fuse inside the microwave, it should be by the place where the cord goes in the microwave.

Apr 08, 2009 | General Electric Microwave Oven

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Need help


1. Have you tested the outlet by plugging in something else and confirming that the outlet is good? If another device doesn't work in the outlet, then you have a bad fuse or breaker that powers that circuit in the house.

2. If power is OK, you probably have a bad fuse in the oven. You'll need to unplug the oven and remove the outside cover. Replace the fuse with the EXACT same rating of fuse of the original.

Please get back to me and let me know what you find.

Good luck!

- Jim

Feb 12, 2008 | Westinghouse WST3504 Microwave Oven

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