E9
Cuisinart
Internal Voltage / Power Supply Error
Display shows E9 and the unit may beep repeatedly and refuse to start.
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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
Failed low-voltage power supply on control board, Loose AC input wiring, Defective line filter or varistor, Shorted component on control PCB
How to Fix / Troubleshooting
Safety first: Unplug the air fryer. Power supply troubleshooting exposes live circuits; if you are not experienced, seek professional service.
- Step 1 – Check outlet: Verify the wall outlet has correct voltage and is not shared with heavy loads. Try a different outlet.
- Step 2 – Inspect power cord: Look for cuts, kinks, or burn marks on the Cuisinart power cord. Replace the cord set if damaged.
- Step 3 – Internal inspection: Remove the housing to access the main control board. Inspect for burnt components, cracked solder joints, or bulging capacitors in the power supply section.
- Step 4 – Reseat connectors: Ensure the AC input wires and any inline line filter are securely connected.
- Step 5 – Replace board: If you see obvious damage or if E9 persists after basic checks, replace the main control board assembly. Component-level repair is not recommended for most users.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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