Question about Microwave Ovens

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Everytime I turn my microwave on my main circuit breaker trips. When the microwave is just plugged in it turns on , but as soon as it tries to give an output the circuit breaker trips. Could this be a faulty fuse in the fuse box or is it just a faulty circuit breaker? Also we have tried the microwave on another circuit within the house and it works perfectly . Your help is very much appreciated.

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  • Microwave Ovens Master
  • 14,553 Answers

You may have either too much also connected to that circuit or the wiring may be involved along with a circuit breaker that needs replacement--you would have to have an electrician look to see if load on it is within limits for what is connected or swap the breaker out with a correct one to see if the issue is the breaker or not.

Posted on Dec 10, 2012

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Posted on Jan 02, 2017

Gort007
  • 1187 Answers

SOURCE: microwave trips circuit breaker when plugged in

The circuit is probably a 20Amp circuit (see the number stamped on the circuit breaker switch). Most likely, it is the same circuit as the refrigerator, crock pot, window A/C unit, etc....

Also, if you are using an extension cord or a power strip or a surge protector. Those may not have a high enough power rating.

One other possibility (not likely) is that the circuit breaker is a 15Amp and the microwave is 1500 watts.

What else is cut off when the circuit breaker is tripped?

Solution is to use a different outlet for the microwave, or turn off any other applicance in the same circuit (except the refrigerator, of course).

Hope this helps!

Posted on Sep 16, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: No power

The door switches are designed to prevent the unit from running while the door is open. You probably have a blown fuse, and it's a white or dark grey ceramic fuse of 15A or 20A, available from local big box stores or appliance parts stores. The fuse is usually located on the floor of the chassis behind the control panel, or mounted in the same area as the door switches. Also, I'm really curious how the door switch got stuck while cleaning? That sounds scary...

Posted on Nov 13, 2006

freetek
  • 5568 Answers

SOURCE: my microwave oven keeps tripping the circuit

If a fuse inside had blown, that would definitely reduce the current flow rather than trip the breaker.
I have replaced several breakers over the years; they no longer last forever.
Try your Amana on a different circuit, not in the kitchen; if that other circuit likes the oven, the breaker is bad. If the alternate circuit breaker also trips, then you have not a blown fuse in the Amana but rather a shorted component inside and repairing the oven will likely cost about the same as replacing it.

Posted on Nov 22, 2009

Treefrog15
  • 127 Answers

SOURCE: How do you reset the microwave power? Is there an

There is an internal cartridge fuse, as well as thermal fuses. It is not recommended that you attempt any internal repairs on a microwave due to the presence of very high voltages and the danger of microwave radiation if not reassembled correctly. Residential microwaves, if not under warrranty, are generally considered disposable. Parts and service are very expensive.

Posted on Feb 25, 2010

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The circuit breakers may both be functioning properly. What might be happening is that both circuits have other current drawing appliances on them. The circuit breakers react to the sum of all of the currents drawn by all of the devices on that circuit. So, if you have a 15 amp microwave and an 8 amp refrigerator on the same circuit, you would overload a 20 amp circuit by 3 amps.

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1 Answer

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Chances are you have a shorted "monitor" interlock switch, or its mount is broken.

See this door switch help file.


You can find links to helpful exploded view diagrams and part ordering help here.



To give you more specific help, we would need the brand name and

full model number of your microwave.


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

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The magnetron probably has a partial short pulling more current than normal as it runs, the other two items that give trouble is the high voltage diode, "sometimes cracks" to the high voltage capacitor, "usually shorts"

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go to the qualified electricians on your place... but there is some helpful tips that can help you.. (1) for continued protection before starting. turn off the main circuit breaker. (2) unplug all the appliances or equipment installed... (3) check all the wall socket outlet... look for any damages on the wall socket... if the wall socket outlet have no signs of burned or wet marked, try to turn on the circuit breaker. check if the problem is solved.. (4) if the wall socket outlet have a signs of burned or wet marked.. just replace that w/ the same type of socket... check also the appliances that may caused the problem... the easiest way to know is to look at the socket plug itself... ty

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1 Answer

The microwave is making a funny sound when turned on and it is popping the circuit breaker


try plugging it on another circuit with no load (a circuit with nothing els connected) if you have other things plugged with the oven (toaster, slow cooker, etc..) it could trip the circuit breaker as a microwave oven needs a 15 amps circuit to operate properly...

good luck!

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1 Answer

Blowing main breaker


I have a hard time believing that the home's main breaker is tripping instead of the branch circuit breaker that feeds the microwave. I suspect it is really just a difference in terms. You should disconnect it and try using in another outlet - preferably one on a different circuit if possible. If the breaker continues to trip; this appliance should be disconnected and either be discarded, repaired or replaced before using again.

If the microwave works as expected (on a different circuit), it may indicate the original circuit is overloaded. Microwave overs are supposed to be installed on a dedicated circuit. This means only one outlet is on the circuit - no other loads (lights, appliances, etc.) are permitted on this circuit. A microwave typically requires 10 Amps or more when on "high" and will require a significant portion of the power supplied by a 15 or 20 amp circuit breaker. There is little unused to power much of anything else. If other appliances go out when the microwave trips the circuit breaker, you should contact an electrician to have a dedicated outlet installed for the microwave.

I hope this helps!

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3 Answers

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The circuit is probably a 20Amp circuit (see the number stamped on the circuit breaker switch). Most likely, it is the same circuit as the refrigerator, crock pot, window A/C unit, etc....

Also, if you are using an extension cord or a power strip or a surge protector. Those may not have a high enough power rating.

One other possibility (not likely) is that the circuit breaker is a 15Amp and the microwave is 1500 watts.

What else is cut off when the circuit breaker is tripped?

Solution is to use a different outlet for the microwave, or turn off any other applicance in the same circuit (except the refrigerator, of course).

Hope this helps!

Sep 16, 2009 | Microwave Ovens

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Chek the high voltage capacitor and the diode . If one of them are short there is a chance for tripping the breaker

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Microwaves that are either built in, a part of the oven, or over the range are on a dedicated circuit by law. This means nothing else could have tripped that breaker but the microwave.
If it has a problem severe enough to trip a 20 amp breaker several times, it is only getting worse each time you reset the breaker and turn it on.
There is a possible chance of fire. I recommend you turn the circuit breaker off and replace the microwave. Is it a plug in, or over the range type?

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1 Answer

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try pluging it in on another outlet with an extension cord must be a diffent cerciut breaker if it happens again the microwave has a short. if not its that breaker or outlet.

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