Display shows E9 and the unit will not start; sometimes appears after a power surge or lightning storm.

Safety first: Unplug the air fryer before any disassembly. This fault is usually electronic, not mechanical.

• Step 1 – Power cycle: Unplug the unit for at least 15 minutes to allow capacitors to discharge. Plug back in and attempt to power on. If E9 returns, continue.
• Step 2 – Factory reset (if supported): Some Ambiano models allow a reset by holding specific buttons (e.g., Power + Temperature Down) for several seconds while plugging in. Refer to the user manual for the exact sequence.
• Step 3 – Surge damage inspection: Remove the cover to access the PCB. Look for burn marks near the microcontroller, EEPROM, or surge protection components (MOV/varistor).
• Step 4 – Replace PCB: Because firmware and EEPROM are typically not field‑programmable on Ambiano air fryers, the standard repair is to replace the entire main control PCB with a compatible part.
• Step 5 – Use surge protection: After replacement, plug the unit into a surge‑protected outlet to reduce the risk of future E9 errors.