E18
OK
Line Voltage / Power Input Error
Microwave shows E18; interior light flickers and unit may shut down unexpectedly
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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
Unstable mains voltage, Loose power cord connection, Faulty line filter board, Damaged power relay on control PCB
How to Fix / Troubleshooting
Safety: Unplug the microwave before inspecting the power input.
- 1. Check the outlet: Plug another appliance into the same outlet to verify stable power. Avoid using extension cords or power strips.
- 2. Inspect power cord: Check the OK microwave's power cord for cuts, kinks, or burn marks. Replace if damaged.
- 3. Internal inspection: Remove the cover and inspect the line filter board and cord connections for loose terminals or discoloration.
- 4. Tighten connections: Secure any loose screws or spade connectors on the line filter and main terminal block.
- 5. If E18 persists with known-good power: The control PCB or line filter assembly may need replacement.
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Repair Difficulty
Medium
3/5
Required Part
Line Filter Board
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