E4 appears on the display and the unit will not heat; fan may run but no cooking occurs.

Safety: Disconnect from power and allow the air fryer to cool. Heating components can remain hot even when the unit is off.

Diagnostic steps:

• 1. Visual inspection: Remove the basket and drawer. Look up toward the heating element. Check for visible breaks in the element coil or heavy burn marks.
• 2. Access heater terminals: Turn the unit upside down and remove the base cover. Locate the two heavy-gauge wires going to the heating element terminals.
• 3. Check connections: Ensure spade connectors are tight on the element and not oxidized or burned. Reseat or replace any loose or discolored connectors.
• 4. Test the element: With a multimeter set to ohms, measure resistance across the heater terminals. A typical element will show a finite resistance (often 10–40Ω). If it reads open (OL), the element is failed and must be replaced.
• 5. Inspect overheat sensor: Some Sunbeam models mount a small thermostat or sensor directly on the heater bracket. Check its wiring and test for continuity. Replace if open and not resettable.
• 6. Control board check: If the heater and sensors test good but E4 persists, the relay or triac on the main control PCB may be defective, requiring board replacement.

Note: Use only OEM or equivalent high‑temperature rated parts. Incorrect heater or sensor ratings can create a fire hazard.