Amana
No Power – Primary Power Circuit Failure
Microwave will 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, Faulty power cord, Failed noise filter/line filter board, Open thermal fuse on cavity or magnetron
How to Fix / Troubleshooting
Safety First: Verify the outlet is not live before touching the plug. Unplug the microwave before any internal inspection.
- Check outlet and breaker: Plug a lamp or other small appliance into the same outlet to confirm power. Reset any tripped breaker or GFCI.
- Inspect power cord: Look for cuts, burns, or kinks. If damaged, the cord must be replaced.
- Internal fuse (advanced): With the cover removed, locate the line fuse near the power cord entry or line filter. Test with a multimeter and replace only with the exact same rating if blown. Investigate why it blew (door switch short, HV fault, etc.).
- Check thermal fuses: Test cavity and magnetron thermal fuses for continuity. Replace any open fuse and correct underlying overheating issues.
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Repair Difficulty
Hard
4/5
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