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Why Does My Microwave Trip the Breaker?

Electrical Services Fort Worth - Neighbors Electric
Neighbors Electric licensed electrician standing beside a company service van in Fort Worth
google logo rating 151+ reviews

Why Does My Microwave Trip the Breaker?

Neighbors Electric licensed electrician standing beside a company service van in Fort Worth
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A microwave trips the breaker because it draws a lot of current in a short burst, usually 1,000 to 1,500 watts, and if it’s sharing a circuit with other kitchen appliances, that combined load overloads the breaker. It can also mean the microwave itself has a fault, or the circuit isn’t sized for it.

The most common cause: sharing a circuit

Most kitchens are built with two 20-amp small appliance circuits meant to cover countertop outlets, but they weren’t necessarily designed with today’s microwave usage in mind. If your microwave shares a circuit with a coffee maker, toaster, or air fryer and you run more than one at the same time, that’s often enough to trip the breaker, especially at breakfast or dinner when several appliances get used back to back. Microwaves pull a heavy but short burst of current when they start, and that spike is often what tips an already-loaded circuit over the edge.

It could be the microwave itself

A microwave that trips the breaker every time you run it, even with nothing else plugged into that circuit, may have an internal fault; a failing capacitor or a short in the magnetron are common culprits in an aging unit. If an older microwave recently started tripping the breaker and nothing about your kitchen setup changed, the appliance is the more likely suspect, not the wiring.

Is it a GFCI trip or a breaker trip?

Worth checking which one actually happened. Kitchen countertop outlets are required to have GFCI protection, either at the outlet itself or at the breaker, and a GFCI trip looks different from an overloaded breaker; the outlet’s reset button will have popped, or a GFCI breaker shows a distinct trip indicator. A GFCI trip usually points to a ground fault, often moisture or a wiring issue at the outlet or in the microwave’s cord, rather than a simple overload.

The real fix: a dedicated circuit

If your microwave, especially a higher-wattage or built-in model, keeps tripping a shared circuit, the long-term fix is giving it its own dedicated circuit so it isn’t competing with other appliances for the same 20 amps. This is standard for over-the-range and built-in microwaves and is often worth doing for a countertop unit too if your kitchen regularly runs several appliances at once. It’s a permitted electrical job, not a DIY outlet swap.

For more on how many things should safely share one circuit, see our guide on how many outlets on one circuit. Neighbors Electric (TECL #41555) installs dedicated circuits for microwaves and other high-draw kitchen appliances throughout Fort Worth and the surrounding DFW area, and handles circuit breaker repair if the trips point to a bigger issue. Call (817) 533-0943 to get it sorted out.

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Ky Nguyen
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Excellent experience with Neighbors Electrical. I messaged them late last night not expecting a response but to my surprise they got me scheduled for an estimate first thing the next morning. Mathew showed up promptly, provided a quote, we agreed on the price and he knocked out the work the same day. He was very professional and cleaned up after the work was complete. I will definitely call Neighbors Electric again if we need any electrical work down on our house.
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Kristian Lopez
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Mathew Chavez demonstrated exceptional skill and quickly identified the underlying issue with the wiring. Will highly recommend neighbors electric for any electrical needs.
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Emily Greenwald
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Very nice technician came and very knowledgeable!
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Emanuel Gonzalez
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Neighbors Electric is fantastic. On time, no nonsense and finished the job quickly. Matthew came and installed a 50 amp outlet for me and I was up and running in no time. Highly recommend and would definitely use again.
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Rikhee Cedillo
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only one who came in 30 minutes
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Wayne Carter
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The team here was great and would not go anywhere else. We got a quote in the morning for an EV charger and they came back in the afternoon to completely install the charge sub panel and surge protectors. I was given the option that I needed and was told that I do not need an upgrade to upsell me. Once done the area was clean and genuinely looked like an upgrade on my house. I would recommend anyone to Neighborhood Electric, you will not be disappointed.
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Tyesha Whitlock
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The reviews did not lie. He was fair and understanding. Would definitely use again. And refer everyone to him. Thank you Mr Valdez
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Steve Jackson
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Very professional and competent. Explained the installation very well. Performed housekeeping at the end of the job. I will definitely use him again in the future.
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Ken Miller
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You have an outstanding team and great owners. Job well done
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Pink Pearl
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I discovered my outlet was burnt after someone "fixed" my leaking window ac unit. Gerardo arrived quickly and replaced it. He was very detailed and attentive. If you have any electrical issues in your home, I highly recommend this company.
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