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HomeRepair HelpMagic Chef Microwave RepairMagic Chef Microwave is tripping circuit breaker Repair
Magic Chef Microwave is tripping circuit breaker
When your Magic Chef microwave is tripping the circuit breaker, the most likely cause is a failed door switch. Most microwaves use three or four door switches, including the primary, secondary, and monitor switches, to confirm that the door is closed in the correct sequence. A defective switch can cause the microwave to trip the breaker when starting or when opening the door, and may also blow the line fuse. Less common causes include a shorted high-voltage capacitor, a shorted magnetron, or a high-voltage transformer that is arcing or producing a burnt smell. Testing these parts requires opening the microwave cabinet. The high-voltage capacitor can store thousands of volts, potentially a lethal charge, even after the microwave is unplugged, so it must be properly discharged before any interior work. Door switch, capacitor, magnetron, and transformer repairs may require a qualified technician if you are not familiar with safe capacitor discharge procedures. Enter your Magic Chef microwave's model number to find the exact replacement part for your specific appliance, including the correct door switch, high-voltage capacitor, magnetron, or transformer.
01 - Magic Chef 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...
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02 - Magic Chef 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 - Magic Chef 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 - Magic Chef 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 Magic Chef microwave tripping the circuit breaker?
Can a Magic Chef microwave door switch cause the breaker to trip?
How do I test the high-voltage capacitor in a Magic Chef microwave?
What should I do if my Magic Chef microwave trips the breaker and smells burnt?
How do I find the correct Magic Chef microwave replacement part?
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