Safety first: Unplug the unit before opening any covers. Allow it to cool if it has been running.

Check environment: Ensure the air fryer is used indoors at normal room temperature (10–35°C). Very cold rooms or garages can cause low‑temperature faults.
Verify basket closure: Make sure the drawer is fully inserted and latched. Heat will escape if it is slightly open.
Test heating performance: With the basket empty, set the fryer to 200°C for 10 minutes. After 5 minutes, carefully feel the exhaust air; it should be very hot. If only lukewarm, suspect a weak element or sensor issue.
Inspect heater and sensor: Remove the top cover to access the heating element and NTC sensor. Check for loose connections, burnt terminals, or a sensor that has come away from the cavity wall.
Measure element resistance: Use a multimeter to confirm the element is within expected resistance range. A significantly higher resistance than spec can indicate a failing element.

If H1 persists and the unit never reaches set temperature, replacing the heating element and/or NTC sensor is usually required.

Display shows H1 and the air fryer does not heat properly or stops heating.

Possible Causes