A method to control operation of a laundry dryer, the laundry dryer comprising: a control unit having a memory in which instructions for a drying cycle, for a first working routine and a second working routine are stored, wherein a selected working routine sets a plurality of operational parameters for a drying cycle of the laundry dryer; a first interface and a second interface, both adapted to transfer a user input command received at the first or second interface to the control unit for operating the laundry dryer; wherein said first interface is remote or separate from the laundry dryer, and wherein said laundry dryer includes a casing and said second interface includes a control panel fixed to the casing, the method including: starting a drying cycle; providing a user input command to the control unit through the first or the second interface to modify the drying cycle, wherein: if the user input command is provided through the first interface then starting the first working routine; if the same user input command is provided through the second interface then starting the second working routine which differs from the first working routine in at least one operational parameter set for operating the laundry dryer. a control unit having a memory in which instructions for a drying cycle, for a first working routine and a second working routine are stored, wherein a selected working routine sets a plurality of operational parameters for a drying cycle of the laundry dryer; a first interface and a second interface, both adapted to transfer a user input command received at the first or second interface to the control unit for operating the laundry dryer; wherein said first interface is remote or separate from the laundry dryer, and wherein said laundry dryer includes a casing and said second interface includes a control panel fixed to the casing, the method including: starting a drying cycle; providing a user input command to the control unit through the first or the second interface to modify the drying cycle, wherein: if the user input command is provided through the first interface then starting the first working routine; if the same user input command is provided through the second interface then starting the second working routine which differs from the first working routine in at least one operational parameter set for operating the laundry dryer. starting a drying cycle; providing a user input command to the control unit through the first or the second interface to modify the drying cycle, wherein: if the user input command is provided through the first interface then starting the first working routine; if the same user input command is provided through the second interface then starting the second working routine which differs from the first working routine in at least one operational parameter set for operating the laundry dryer. if the user input command is provided through the first interface then starting the first working routine; if the same user input command is provided through the second interface then starting the second working routine which differs from the first working routine in at least one operational parameter set for operating the laundry dryer.