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 HelpRCA Microwave RepairRCA Microwave is tripping circuit breaker Repair
RCA Microwave is tripping circuit breaker
When your RCA microwave is tripping the circuit breaker, especially when you press Start or open the door, a failed 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. If a switch fails or the door latch does not actuate the switches in the correct sequence, the microwave may trip the breaker or blow the line fuse. 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. Testing these parts requires a multimeter and access inside the cabinet. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged, so it must be properly discharged before the cabinet is opened or any interior repair is attempted. Repairs involving the door switches, high-voltage capacitor, magnetron, or high-voltage transformer may require a qualified technician if you are not familiar with capacitor discharge procedures. Enter your RCA microwave model number to find the exact replacement part for your specific appliance.
01 - RCA 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 - RCA 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 - RCA 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 - RCA 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 RCA microwave tripping the breaker when I open or close the door?
What should I check first when my RCA microwave keeps tripping the breaker?
Is a tripping RCA microwave dangerous to use?
Can I test the high-voltage capacitor, magnetron, or transformer in my RCA microwave with a multimeter?
How do I find the correct RCA microwave door switch or fuse?
Shop by RCA Microwave Parts
Shop by Popular RCA 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