Display shows E3 and the air fryer will not heat.

Safety first: Unplug the air fryer and allow it to cool completely before opening the cabinet.

Steps to diagnose E3 heating fault:

• 1. Visual inspection: Remove the basket and drawer. Look up toward the heating element. Check for obvious breaks in the coil, heavy pitting, or burn marks.
• 2. Access heater wiring: Turn the unit upside down and remove the bottom or rear cover. Locate the two heavy-gauge wires going to the heating element terminals.
• 3. Check connections: Inspect the spade connectors for discoloration, melting, or looseness. Reseat or replace damaged connectors. Ensure all screws securing the element bracket are tight.
• 4. Test the heating element: Disconnect at least one wire from the element. Use a multimeter to measure resistance across the terminals. A typical air fryer element may read between 10–40 ohms. Infinite resistance indicates an open element that must be replaced.
• 5. Check thermal fuse: Many Black+Decker air fryers include an in-line thermal fuse in the heater circuit. Locate the small cylindrical component wrapped in heat-resistant sleeving near the element wiring. Test for continuity; if open, replace with the same temperature and current rating.
• 6. Inspect the control board relay: If the element and fuse test good, inspect the main control PCB for a burnt or stuck heater relay. Signs include charring, cracked solder joints, or a melted relay case. Replace the control board if the relay is defective.

Only use OEM or equivalent-rated heating elements and thermal fuses. Incorrect parts can cause overheating or fire.