Bella air fryer shows E7 and will not heat, though the fan may still run.

Safety first: Unplug the air fryer and let it cool completely. The heater area can remain hot for some time after use.

Visual inspection:

• Remove the top or rear cover to access the heating element assembly.
• Look for obvious breaks in the heater coil, burnt spots, or melted insulation near the heater terminals.
• Check the spade connectors where the wires attach to the heater. Burnt or loose connectors can cause an open circuit.

Continuity testing:

• With the unit unplugged, disconnect at least one wire from the heating element.
• Use a multimeter set to ohms to measure resistance across the heater terminals. A typical air fryer heater will show low resistance (often 10–40Ω). An open reading (OL) indicates a failed element.
• Test any inline thermal fuse or thermostat in series with the heater for continuity as well.

Repairs:

• Replace a failed heating element with a compatible Bella air fryer heating element assembly. Ensure all connections are tight and insulated.
• If the heater and thermal fuse test good but E7 persists and the heater never energizes, the heater relay or triac on the control PCB may be defective, requiring board replacement.