Display shows E9 and the air fryer will not operate.

Safety first: Unplug the air fryer before opening the housing. Avoid touching circuit boards with wet hands.

Steps to address E9:

• Power reset: Unplug the unit for at least 10–15 minutes to allow capacitors to discharge and the microcontroller to fully reset. Plug back in and test.
• Check for moisture: If the air fryer was recently cleaned aggressively or used under a cabinet, moisture may have entered the control area. Let the unit dry in a warm, dry place for 24 hours (unplugged) and try again.
• Inspect internal connections: Remove the bottom cover and, if needed, the front panel to access the display PCB and main control PCB. Check any ribbon cables or multi-pin connectors between boards. Reseat them carefully.
• Look for damage: Inspect both boards for burnt components, corrosion, or cracked solder joints, especially around connectors.
• Replace control board(s): If reseating cables does not clear E9, replace the Kalorik main control PCB. On some models, the display and power/control are a single assembly; in that case, replace the entire control/display board assembly.

Firmware reprogramming is generally not user-serviceable on Kalorik air fryers; board replacement is the standard repair.