Microwave displays E8 and will not start; sometimes occurs after a loud pop or blown fuse event.
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.
Possible Causes
How to Fix / Troubleshooting
Critical safety: Unplug the microwave. A blown fuse usually indicates another underlying fault. Do not bypass or oversize the fuse.
Access and inspection:
- Remove the outer cabinet to locate the line fuse (typically in a fuse holder or inline clip near the power cord entry).
- Check the fuse visually; if the filament is broken or glass is blackened, it is blown.
- Use a multimeter to confirm the fuse is open (no continuity).
Find the cause before replacing:
- Inspect door switches and wiring for shorts or burn marks.
- Check the high-voltage diode and capacitor for obvious damage or short circuits (advanced, high-voltage safety required).
- Look for pinched wires where the cabinet or mounting screws may have cut insulation.
Corrective actions:
- Replace any shorted door switch, damaged wiring, or failed high-voltage component before installing a new fuse.
- Install a replacement line fuse with the exact same rating (amperage and type) specified by Magic Chef.
Test: Reassemble, plug in, and test with a short cook cycle. If the fuse blows again or E8 returns, stop and seek professional service; there may be a deeper high-voltage or control board fault.