E9
Insignia Low Voltage / Power Supply Fault

Display shows E9 and the coffee maker will not power on fully or the display is blank with only the error code flashing briefly.

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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

Internal power supply board failure, Blown internal fuse, Loose AC input wiring, Shorted component on control board drawing excessive current

How to Fix / Troubleshooting

Safety first: Unplug the coffee maker before any inspection. Internal components carry mains voltage.

  • Check outlet and cord: Verify the wall outlet has power by testing with another appliance. Inspect the power cord for cuts, kinks, or burn marks. Do not use the unit if the cord is damaged.
  • Try a different outlet: Avoid GFCI or surge-protected strips during testing to rule out external trip issues.
  • Inspect for burning: If you smell burning or see smoke, do not attempt further use. The internal power supply may be damaged.
  • Internal fuse check (advanced): With the bottom cover removed (unplugged), locate the small glass or ceramic fuse on the power input side of the control board. If visibly blown, replace only with the same rating and type. If it blows again immediately, there is a deeper fault.

Because E9 indicates a power supply problem, replacement of the control/power board is often required and should be done by a qualified technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Power Supply / Control Board Assembly
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