Display shows E5 and the coffee maker shuts down or refuses to start, sometimes after a power surge or outage.

Safety first: Unplug the coffee maker before any inspection. Do not attempt repairs if you see or smell burning.

• Power cycle reset: Unplug the unit for at least 10 minutes. Press and hold the power or brew button for 10 seconds while unplugged to discharge capacitors, then plug back in and check if E5 clears.
• Try a different outlet: Plug the coffee maker directly into a known-good wall outlet (no power strip) to rule out supply issues.
• Inspect for surge damage: If accessible, remove the bottom cover and visually inspect the control board for burnt components, bulging capacitors, or darkened areas. Do not touch components with the unit plugged in.
• Check connectors: Ensure all multi-pin connectors on the control board are fully seated and not corroded.

If E5 remains, the main control board is likely defective and should be replaced with an Insignia-compatible board. This repair is best performed by a qualified technician due to mains voltage exposure.