Air fryer powers on but does not heat; fan runs and timer counts down, food remains cold.

Safety first: Unplug the Crux air fryer and let it cool. Heating components are connected directly to mains voltage.

• Confirm no heat: Run a short cycle at maximum temperature for 3–5 minutes. Carefully feel near the exhaust (without blocking it). If only room-temperature air is coming out, proceed with checks.
• Inspect heater visually: Remove the housing and look at the heating element above the cooking cavity. Check for breaks, burn marks, or sagging coils.
• Check thermal fuse: Locate the thermal fuse in series with the heater. Test for continuity with a multimeter. Replace if open with a matching Crux-rated thermal fuse.
• Test heater resistance: Disconnect heater leads and measure resistance. An infinite reading indicates a failed element that must be replaced.
• Check PCB relay: If heater and fuse are good, the heater relay on the main control PCB may not be switching. Inspect for burnt contacts or cracked solder joints; replace the PCB if defective.