Café
Overcurrent / Short Circuit Under Load
Microwave trips the household circuit breaker or GFCI outlet when starting a cook cycle.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Shorted high-voltage capacitor or diode, Shorted magnetron, Damaged power cord, Faulty line filter board
How to Fix / Troubleshooting
Critical safety warning: Repeatedly resetting a breaker that trips immediately can be dangerous. Do not continue to use the microwave until the cause is identified.
User-level checks:
- Try another outlet: If possible and safe, plug the Café microwave into a different properly grounded 120V outlet on a separate circuit (not a GFCI) to rule out a weak breaker.
- Observe timing: If the breaker trips as soon as START is pressed, a short in the high-voltage system is likely.
- Stop using the unit: Unplug the microwave and schedule service. Internal components such as the magnetron, capacitor, or diode must be tested and replaced by a technician.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Diode
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