Display shows E8 and the unit beeps, sometimes after a loud click or pop, and will not heat.

Safety first: Unplug the air fryer. Internal components can carry mains voltage even when the unit is off.

• Step 1 – Confirm symptom: Start a cook cycle and listen for the relay click. If E8 appears immediately with no click, the control may not be driving the relay. If you hear a rapid clicking, the relay may be failing.
• Step 2 – Access PCB: Remove the bottom or rear cover to expose the main control PCB. Identify the heater relay or triac (usually a larger component near the heater terminals).
• Step 3 – Visual inspection: Look for burn marks, cracked casing, or discoloration around the relay/triac. Check for cold solder joints on the relay pins.
• Step 4 – Replace PCB or relay: On many Ambiano models, the relay is soldered directly to the board. The most practical repair is to replace the entire main control PCB. Skilled technicians may desolder and replace the relay with an identical part.
• Step 5 – Verify heater: Before replacing the PCB, confirm the heating element is not shorted or open (see E5 entry). A faulty heater can damage the relay.
• Step 6 – Test after replacement: Reassemble, plug in, and run a short test cycle at low temperature to verify normal operation and that E8 no longer appears.