An electrically operated aerosol-generating system comprising means to detect adverse conditions, such as a dry heater. The system comprises an electric heater comprising at least one heating element for heating an aerosol-forming substrate, a power supply, and electric circuitry (109) connected to the electric heater and to the power supply and comprising a memory, the electric circuitry being configured to: measure an initial electrical resistance (R1) of the electric heater； measure a subsequent electrical resistance of the electrical heater after the measurement of the initial electrical resistance； determine the difference (△R) between the initial electrical resistance and the subsequent electrical resistance； determine an adverse condition when the determined difference between the subsequent electrical resistance and the initial electrical resistance is greater than a maximum threshold value (△Rmax) or is less than a minimum threshold value (△Rmin) stored in the memory； and control power supplied to the electric heater based on whether there is determined to be an adverse condition or to provide an indication if there is determined to be an adverse condition.一種電操作式氣溶膠產生系統，其包括偵測不利狀態(例如變乾的加熱器)之裝置。系統包括電熱器、電源及電路(109)。電熱器包括用於加熱氣溶膠形成基材之至少一加熱元件。電路連接至電熱器及電源且包括一記憶體。電路係配置成用以：測量電熱器之起始電阻(R1)；在起始電阻之測量後，測量電熱器之後續電阻；測定該起始電阻與該後續電阻間之差距(△R)；當該後續電阻與該起始電阻間之決定差距大於在記憶體中所儲存之一最大臨界值(△Rmax)或小於在記憶體中所儲存之一最小臨界值(△Rmin)時，決定一個不利狀態；以及根據是否決定為一個不利狀態，控制對電熱器所供應之電力，或者如果決定為一個不利狀態，則提供一個指示。
