Display shows H1 and the smoker will not heat above a low temperature; heating cycles are very short.

Safety first: Unplug the smoker and let it cool.

Steps:

• Clean the sensor: Inside the chamber, clean the temperature probe thoroughly to remove grease that can cause false high readings.
• Check mounting: Ensure the sensor is firmly attached to the wall and not hanging loose. Tighten mounting screws if present.
• Compare with external thermometer: Run the smoker at a set temperature and compare with a reliable oven thermometer. If the display reads much higher than actual, the sensor is likely drifted.
• Replace sensor: Swap the temperature sensor probe with a new Klarstein‑specified NTC sensor. Clear any stored error by unplugging for several minutes, then retest.