Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpKitchenAid Microwave RepairKitchenAid Microwave is tripping circuit breaker Repair
KitchenAid Microwave is tripping circuit breaker
Is your KitchenAid microwave tripping the circuit breaker? Especially when the door opens or closes, a defective door switch is the most likely cause. Most microwaves use three or four interlock switches, including the primary door switch, secondary door switch, and monitor switch, to confirm that the door is securely closed. A failed switch can cause the line fuse to blow or the microwave to keep tripping the breaker. If the door switches test properly, a shorted high-voltage capacitor is the next likely cause, followed by a shorted magnetron or high-voltage transformer. A failed transformer may also arc or produce a burnt smell. These components are inside the cabinet, where the high-voltage capacitor can store a lethal charge even after the microwave is unplugged. Proper capacitor discharge is required before interior work, and this repair may require a qualified technician if you are not familiar with the procedure. Do not continue using a KitchenAid microwave that trips the breaker. Enter your model number to find the exact replacement door switch, capacitor, magnetron, or transformer for your specific microwave.
01 - KitchenAid Microwave Door Switch
Most microwaves have three or four door switches. When the microwave door closes, the door switches actuate in sequence to ensure that the door is closed properly. If any of the door switches fail, the microwave line fuse can blow, or the circuit breaker may trip. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches lack continuity, replace the defective switch. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Due to the potenti...
Enter model number to search for the required part specific to your product
Top Solution
02 - KitchenAid Microwave High Voltage Capacitor
A microwave that is tripping a circuit breaker can be caused by a shorted high voltage capacitor. You can determine that a capacitor has shorted by contacting one multimeter lead to one of the capacitor's terminals and the other lead to the casing. If meter display indicates that electrical continuity is present between any of the capacitor terminals and the casing, or the terminals show continuous continuity between them, the component has shorted and will need to be replaced.
Uncommon But Possible
03 - KitchenAid Microwave Magnetron
A microwave that is tripping a circuit breaker can be caused by a shorted magnetron. You can determine that a magnetron has shorted by contacting one multimeter lead to one of the magnetron's terminals and the other lead to the casing. If meter display indicates that electrical continuity is present between any of the terminals and the casing, the magnetron has shorted and will need to be replaced.
Uncommon But Possible
04 - KitchenAid Microwave High Voltage Transformer
A microwave that is tripping a circuit breaker can be caused by a shorted high voltage transformer. When a high voltage transformer shorts out, it will usually arc and smell burnt.
Uncommon But Possible
Frequently Asked Questions
Why is my KitchenAid microwave tripping the breaker when I open or close the door?
What should I check first if my KitchenAid microwave keeps tripping the circuit breaker?
Can a high-voltage capacitor cause a KitchenAid microwave to trip the breaker?
Is a KitchenAid microwave that trips the breaker dangerous to use?
How do I find the correct KitchenAid microwave breaker, fuse, or door switch replacement part?
Shop by KitchenAid Microwave Parts
Shop by Popular KitchenAid Microwave Models
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com