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 completely before opening.

• Confirm symptom: Run the unit for 3–5 minutes. If the interior remains at room temperature and no warmth is felt near the exhaust, proceed with checks.
• Inspect heater and wiring: Access the heating element assembly. Look for visible breaks in the element, burnt spots, or loose connectors.
• Test element resistance: Use a multimeter to measure resistance across the heater. An open circuit indicates a failed element that must be replaced.
• Check thermal cut-out: Locate the thermal cut-out / high-limit thermostat in series with the heater. Test for continuity; replace if open and non-resettable.
• Relay/board: If heater and cut-out are good, listen for a click from the heater relay when starting a cycle. No click or burnt relay contacts on the main control board indicate the board should be replaced.