Air fryer does not power on at all (no lights, no display, no beeps).

Safety first: Unplug the unit before any disassembly. Mains voltage is present inside even when the unit appears dead.

Basic user checks:

• Outlet and breaker: Test the outlet with another appliance. Reset any tripped breaker or GFCI.
• Power cord: Inspect the cord for cuts or burn marks. Try a different outlet without an extension cord.

Internal checks (advanced):

• Access power entry: Remove rear/bottom cover to expose the power cord connection and fuse (if present).
• Check internal fuse: Locate the glass or ceramic fuse on the power board. Test with a meter and replace with the same rating if open.
• Inspect thermal fuse: Some models route power through a thermal fuse near the heater. Test for continuity; replace if open.
• Check power switch/touch board: For models with a mechanical switch, test continuity when switched on. For touch panels, verify the low-voltage supply from the power board to the panel.

When to stop: If fuses blow again immediately or you find burnt components on the board, discontinue use and replace the control/power board or consult a technician.