Safety first: Unplug the air fryer before opening the housing.

Steps to address E9 control errors:

1. Allow full cool-down: Unplug the unit and let it sit for at least 30 minutes. Then plug back in and test. If E9 only appears when very hot, ensure proper ventilation around the unit.
2. Check for moisture: Inspect the control panel area for signs of moisture or steam intrusion. Do not operate the air fryer directly under a range hood that vents steam onto it.
3. Inspect internal harnesses: Remove the top or rear cover to access the main control PCB. Reseat all low-voltage connectors (to display, keypad, sensors, fan, etc.).
4. Visual board inspection: Look for cracked solder joints, especially under larger components, and for any burnt or discolored areas.
5. Replace control board: If E9 persists after reseating connectors and ensuring proper cooling, the main control PCB is likely faulty and should be replaced with a compatible Black+Decker air fryer control board.

Firmware reprogramming is typically not supported at the consumer level; board replacement is the standard remedy.

E9 appears intermittently, often when the unit is hot or after long use.

Possible Causes