Laundry treatment appliance comprising: - a casing; - a drum mounted inside said casing and designed to receive laundry; - a heat pump system comprising a closed recirculation circuit containing a refrigerant; - a door to give access to the drum; - a main power line providing an AC supply voltage ( V SUPPLY); - a door power line connectable to the main power line to receive the AC supply voltage ( V SUPPLY); - a door-lock device switchable into a locking or unlocking state to respectively lock or unlock the door to respectively allow or prevent connection between the door power line and the main power line; - a switching arrangement connected to the door-lock device; - a driving device configured to drive the door-lock device to switch it into the locking or unlocking state, and a control unit configured to control the switching arrangement and the driving device during a door-lock procedure and a door-unlock procedure, wherein the switching arrangement comprises a first safety switch switchable into a closed or an open state for respectively allowing or preventing connection between the driving device and the door-lock device, and a second safety switch switchable into a closed or an open state for respectively allowing or preventing connection between the door-lock device and the door power line, the first and second safety switches being arranged each one in a respective sealed housing ( 230 H, 235 H), so as to prevent leakages of refrigerant from entering the first and second safety switches, and wherein the control unit is configured to control the first and second safety switches to avoid a concurrent closed state of the first and second safety switches during the door-lock procedure and the door-unlock procedure. - a casing; - a drum mounted inside said casing and designed to receive laundry; - a heat pump system comprising a closed recirculation circuit containing a refrigerant; - a door to give access to the drum; - a main power line providing an AC supply voltage ( V SUPPLY); - a door power line connectable to the main power line to receive the AC supply voltage ( V SUPPLY); - a door-lock device switchable into a locking or unlocking state to respectively lock or unlock the door to respectively allow or prevent connection between the door power line and the main power line; - a switching arrangement connected to the door-lock device; - a driving device configured to drive the door-lock device to switch it into the locking or unlocking state, and a control unit configured to control the switching arrangement and the driving device during a door-lock procedure and a door-unlock procedure, wherein the switching arrangement comprises a first safety switch switchable into a closed or an open state for respectively allowing or preventing connection between the driving device and the door-lock device, and a second safety switch switchable into a closed or an open state for respectively allowing or preventing connection between the door-lock device and the door power line, the first and second safety switches being arranged each one in a respective sealed housing ( 230 H, 235 H), so as to prevent leakages of refrigerant from entering the first and second safety switches, and wherein the control unit is configured to control the first and second safety switches to avoid a concurrent closed state of the first and second safety switches during the door-lock procedure and the door-unlock procedure.