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

Safety first: Unplug and allow the unit to cool before accessing internal components.

Steps to diagnose no heat:

• Check for faint warmth: Run a short cycle and carefully feel near the exhaust vents (without blocking them). If there is absolutely no warmth, proceed to internal checks.
• Access heater assembly: Remove the housing to expose the heating element and thermal fuse.
• Inspect wiring: Ensure all spade connectors on the heater and thermal fuse are tight and not oxidised.
• Test heater and fuse: Use a multimeter to check continuity of the heating element and thermal fuse. Replace any open components.
• Check PCB relay: Listen for a click from the main control PCB when starting a heating cycle. If no click and the heater circuit is good, the relay/triac or PCB is likely faulty and should be replaced.