An aerosol-generating device is provided, including: an induction heater configured to heat an aerosol-forming substrate and including an induction coil and a heating element, the heating element being arrangeable within the induction coil, the induction coil including a first side opening along a longitudinal length of the induction coil, and the first side opening being configured to enable access to the heating element; and a housing, the induction coil being arranged within the housing, and the housing including a second side opening, which corresponds to the first side opening of the induction coil within the housing. A method for manufacturing the aerosol-generating device is also provided.