Indesit
Short circuit under load
Microwave trips the household circuit breaker or blows the fuse as soon as START is pressed.
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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, Shorted high‑voltage diode, Shorted magnetron, Internal short in mains filter or wiring
How to Fix / Troubleshooting
Safety first: Unplug the microwave immediately after a trip. Do not repeatedly reset the breaker and retry.
- Step 1 – Try another outlet: Plug into a different, properly rated outlet to rule out a faulty socket (do not use extension leads).
- Step 2 – Observe when it trips: If the breaker trips only when cooking starts (not when the door is opened/closed), the fault is likely in the HV or heater circuits.
- Step 3 – Visual inspection (advanced): With the cover removed and unit unplugged, inspect the HV capacitor, diode, magnetron, and mains filter for burn marks or melted insulation.
- Step 4 – Professional testing: A technician will discharge the capacitor and test each suspect component with a meter. The shorted part must be replaced with the correct Indesit spare.
Warning: Do not attempt to test or discharge the HV capacitor without proper training.
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Repair Difficulty
Professional Required
5/5
Required Part
High‑Voltage Capacitor
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