LG air fryer runs but does not heat; fan operates and timer counts down, but food stays cold.

Safety first: Unplug and cool the unit before opening. Heating circuits carry high current.

Steps to diagnose no heat:

• Confirm symptom: Run a short cycle and check if any warmth is felt near the exhaust. If completely cold, proceed.
• Inspect heater and wiring: Remove the cover to access the heater. Look for broken coils, burnt connectors, or discolored wiring.
• Test heater continuity: Disconnect one heater lead and measure resistance across the element. An open reading indicates a failed heater that must be replaced.
• Check thermal fuse: Locate the thermal fuse near the heater. Test for continuity; if open, replace with the same temperature and current rating after confirming the cause of overheating.

Note: If heater and thermal fuse are good, the main control board’s heater relay or triac may be defective and require board replacement.