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 (MPL) providing an AC supply voltage ( V SUPPLY ); - a door power line (DPL) connectable to the main power line (MPL) 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 (DPL) and the main power line (MPL); - a switching arrangement (SA) 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 (SA) and the driving device during a door-lock procedure and a door-unlock procedure, wherein the switching arrangement (SA) 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 (DPL), 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 (MPL) providing an AC supply voltage ( V SUPPLY ); - a door power line (DPL) connectable to the main power line (MPL) 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 (DPL) and the main power line (MPL); - a switching arrangement (SA) 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 (SA) and the driving device during a door-lock procedure and a door-unlock procedure, wherein the switching arrangement (SA) 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 (DPL), 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. <EOS>