Aerosol Generation Device

A method for an aerosol generation device, wherein the device comprises a heating arrangement for heating an aerosol substrate, an electrical power source, a first switching element for controlling a supply of electrical power from the electrical power source to the heating arrangement, and a second switching element for decoupling the heating arrangement from the electrical power source, wherein the heating arrangement, the first switching element and the second switching element are arranged in series between terminals of the electrical power source,

• the method comprising detecting a fault in the device by:
• controlling, during a first time period, one of the first switching element and the second switching element to be on and other one of the first switching element and the second switching element to be off, and
• determining whether at least one observable event occurs during the first time period, the at least one observable event indicating that an amount of power is transferred to the heating arrangement,
• wherein a fault is detected in the other one of the first switching element and the second switching element if the at least one observable event is determined to occur during the first time period.