Nuwave air fryer does not power on at all; no lights or display when plugged in.

Safety First: Ensure the unit is unplugged before opening the housing. Do not attempt repairs if you are unfamiliar with working around mains voltage.

Step-by-step checks:

• Verify outlet: Plug a lamp or other small appliance into the same outlet to confirm it has power. Reset any tripped breakers or GFCI outlets.
• Check power cord: Inspect the Nuwave power cord for cuts, fraying, or burn marks. Wiggle the plug gently in the outlet; if the unit flickers, the cord or plug may be loose internally.
• Internal fuse (advanced): With the unit unplugged, remove the outer shell and locate the inline fuse or board-mounted fuse near the power entry. Check it visually for a broken filament or test with a multimeter for continuity.
• Replace fuse: If the fuse is blown, replace it with the exact same type and rating. If it blows again immediately, there is a deeper short in the power supply or heater circuit that must be diagnosed.
• Inspect main board: Look for burnt components, especially near the AC input and rectifier section. A charred board usually means the main control board must be replaced.

Warning: If you see heavy burn damage or smell strong burning odors from inside the unit, discontinue use and consult a professional technician rather than attempting further repair.