Ambiano
No Power – Line Fuse or Thermal Fuse Open
Microwave does not start at all; display is blank and no lights or sounds when door is opened or buttons are 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
Blown internal line fuse, Open cavity thermal fuse, Faulty power cord, Tripped household breaker
How to Fix / Troubleshooting
Safety first: Unplug the microwave and verify the outlet has power using another appliance.
- Check home power: Reset any tripped breakers or replace blown fuses in your home's electrical panel.
- Inspect power cord: Look for visible damage to the Ambiano microwave cord. If damaged, the cord must be replaced by a qualified technician.
- Internal fuse check (technician-level):
- Remove the outer cover.
- Locate the line fuse near the power cord entry. Test for continuity with a multimeter.
- If blown, investigate for underlying causes (shorted HV components, door switch issues) before replacing with the exact same rating.
- Thermal fuse: Locate cavity or magnetron thermal fuses (small, round or rectangular devices clipped to metal surfaces). Test for continuity and replace if open.
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Repair Difficulty
Hard
4/5
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